One Iron Golf Pro-Line Single Length Clubs Collection 8 Iron Set
One Iron Golf Pro-Line and Low Profile Fairway Woods Combo Set
1 Iron Golf Pro-Line Wedges Collection GW, SW, LW
1 Iron Golf Pro-Line Irons on White background
One Iron Golf Pro-Line Full 11 iron set
Pro-Line Specifications Chart for One Iron Golf
Closeup of Grip used on One Iron Golf clubs
One Iron Golf Pro-Line Single Length Clubs Collection 8 Iron Set
One Iron Golf Pro-Line and Low Profile Fairway Woods Combo Set
1 Iron Golf Pro-Line Wedges Collection GW, SW, LW
1 Iron Golf Pro-Line Irons on White background
One Iron Golf Pro-Line Full 11 iron set
Pro-Line Specifications Chart for One Iron Golf
Closeup of Grip used on One Iron Golf clubs

Pro-Line Irons: Sets From $699

Regular price $699.00

Shipping calculated at checkout.

Since we custom build all orders, please allow 7-10 business days for your order to ship. For questions, please contact us. Thank you!

***Left Hand Pro-Line Note: Due to the pandemic, foundries world-wide have shut down or are working at a greatly reduced capacity. As such, our left hand Pro-Line clubheads will not be available until early 2022, we apologize for any inconvenience.

Precision Tooling, Shaft Balancing, and Club Stability for the ultimate in Precise Shot Making. Modeled after touring irons, maximize your distance without compromising accuracy.

  • Available in Right and Left Hand.
  • Custom fitted based upon your wrist-to-floor measurement (see below for measurement instructions).  
  • Tour proven clubhead design.
  • 2º stronger loft angles throughout the set for increased distance.
  • Lighter clubhead weight for increased swing speed and distance.
  • Deep undercut rear cavity produces and extremely low COG for maximum trajectory and distance.
  • Identical club length, clubhead lie angle, swing-weight and (MOI), and shaft flex throughout the set.
  • Steel shafted for the highest level of consistency/accuracy.
  • Shaft flex plane orientation (Spine Align/Puring).
  • State of the art precision casting, grinding, and polishing.
  • Optimized shaft tip section for extreme stability through impact and tighter shot dispersion.
  • Latest groove technology for maximum back-spin.
  • Conforms with the Rules of Golf.
  • Built in the USA.

Click here to shop the Used/Demo Pro-Line Iron Sets.

Custom Fitting Single Length Irons

All human beings share the same skeletal, muscle, tendon, and joint functions and from a mechanical standpoint are the same regardless of height or sex. Non-mechanical differences arise in custom fitting however, for instance: the height of a bicycle seat needs to be greater for a taller person than a shorter person even though the mechanical design of the bicycle remains the same. By the same token there is only one true fitting variable in the building of golf clubs and that is club length. Based upon your wrist-to-floor measurement we adjust your club length to correspond to the lie angle of our club-heads in order to ensure a proper fitting.

Wrist-to-Floor Measurement
Taking your Wrist-to-Floor Measurement:
  • The wrist-to-floor measurement should be taken while standing on a hard surface.
  • Wear jogging/gym shoes (not golf shoes).
  • Stand with your back against the wall at strict military attention. Place your shoulders and head against the wall, your feet together, and your arms rigid and straight down at your sides.
  • Hold a pencil in your right hand (right handed golfer). Back your arms against the wall and then take the pencil and make a mark where your left wrist joint hits the wall. Just the opposite for a left-handed golfer.
  • Measure from this mark to the floor.
  • Important: Do not round-up the measurement to the next higher inch increment. For instance, if your measurement is 34 and 7/8″, do not round up to 35″.

One Iron Golf Club Lengths

One Iron Golf Club Lengths - Wrist to Floor Measurements

Very Important:

Do not order based upon what you consider to be your favorite iron (ie: #7 iron), and do not use that corresponding wrist-to-floor measurement when placing your order. When ordering you need to specify your actual wrist-to-floor measurement to ensure a proper fitting. This chart reflects club length based upon our club-head lie angles. Consequently, our fitting process does not apply to any other brand.

For the taller golfer:  based upon your wrist-to-floor measurement you may be concerned that your irons would be a typical #3 or #4 iron club length; however, do not compare your measurement to your current #3 or #4 iron. The lie angles of your “long” irons are much flatter than ours which, at your size, requires you to bend over excessively and reach out for the ball at address. The club head lie angle of our irons is 63.5º which is far more upright and allows you, for the first time, to stand upright and much closer to the ball at address resulting in the ideal upright swing posture and swing plane. The taller golfer benefits the most from our fitting formula since they have never played golf clubs that have even come close to fitting them properly. The result being that they have had to develop a very inefficient posture and swing where they are bent over excessively and reaching way out for the ball with every iron in the bag.

How Does the Wrist-to-Floor Measurement Work?

It is based upon trigonometry. At the point of ball impact in the downswing, your wrist, the ground, and the club-head, form a right triangle. Assuming an ideal swing posture, there is a non-linear mathematical relationship between your wrist-to-floor measurement while standing at attention and your wrist-to-ground distance at ball impact.

The club-head lie angles are known for the irons and fairway woods as well as the length of one side of the right triangle based upon your mathematically factored wrist-to-ground distance at impact. This gives us the measurement of two angles and the length of one side. We then use trigonometry to solve for the hypotenuse or club length. This is somewhat oversimplified as we factor in shaft deflection and numerous other factors. The fitting formula that we developed produces the ideal golf club length for anyone regardless of height or arm length.

Why Conventional Custom Fitting Does Not Work


  • You can purchase your order using any of the options listed during checkout. If you would rather pay with a check or money order, contact us for instructions through the Contact page of this website. This option is available to USA residents only.
  • Since all orders are custom built your credit card will be charged when production begins (within 24 hours).
  • On the shipping date you will receive an email with your tracking number.
  • Ohio residents will be charged 7.25% sales tax.

International Ordering

  • We ship world-wide.
  • International shipping charges include brokerage/clearance fees.
  • Import duties and taxes are the responsibility of the customer and will be collected upon delivery. If these taxes are not paid your order will be shipped back to us and we will deduct from your refund the cost of shipping both ways and the import duties/taxes charged to us. Check with your local customs office for estimated duties/taxes.

Return Policy

Fully try-out our golf clubs at your home course and at your convenience for a full month. We feel that to truly evaluate a set of golf clubs to determine if they are right for you takes time; and hence, our 30-day return policy (does not include Used/Demo golf clubs, Accessories, or Special Orders). To our knowledge we are the only golf club manufacturer in the entire industry who offers a full money-back return policy on golf clubs after they have been played which should tell you volumes about our commitment to our customers.

If you are not completely satisfied you may return your golf clubs within 30-days of receipt for a full refund of your original purchase price (no hidden fees or re-stocking charges). A return authorization must be obtained before we can accept a return of merchandise. Contact us for this authorization on-line through the Contact page of this website. Shipping/handling charges are not refundable. All contents listed on the original Packing Slip must be included for a full refund. Return shipping charges are the responsibility of the customer. Our return policy is only valid once per customer. Any alterations to the original golf club voids this policy.

If shipping from outside the USA make sure to show that the country of origin is the USA and is a return of USA manufactured goods on the customs form. Also, be sure to make clear that you (the shipper) are responsible for all shipping charges and any brokerage/storage/handling/duties and taxes incurred. We will not accept any return package where a payment is due - the shipment will be returned to you at your cost. Any charges incurred by us will be deducted from your refund.

Limited Warranty

We warrant our golf clubs to be free of defects in material and workmanship for a period of one year following the original ship date. We will, without charge to the original purchaser, repair or replace the club if it proves to be defective during normal use within this period (normal use does not include misuse or abuse and the associated damages ie: dents on the top, side, rear, or sole of a wood club-head). This does not cover grip or cosmetic wear and tear due to normal usage. Any alterations to the original golf club voids this warranty.

Customer Reviews

Based on 6 reviews
Tod Massa
Had doubts about single-length wedges

I had gotten so comfortable with my traditional wedges and having a better short game than the folks I play with that moving to single-length wedges seemed a bad idea. However, after really liking the initial results with my Pro-Line irons I bit the bullet and added the wedges. They take some getting used to, but they are working well for me. Another few weeks and I will probably forget I ever used anything else.

Dustin Baker
These irons Made Golf Fun Again!

I’m a believer... These irons immediately improved my game. I constantly ride the line of wanting to tell everyone I play with and not telling anyone to maintain a competitive advantage. Since implementation of these irons I no longer have the complete meltdown holes of duffing long iron shots or missing greens inside 100 yards. I still have the shot here and there that’s super fat, but I’ll
Tell you what... it still goes straight, every time. I’m now consistently placing 200 yard fairway wood shots onto the green for birdie puts and regularly paring consecutive holes, and If you knew my previous game... you’d be shocked. The consistency and accuracy is remarkable. Since starting these irons ive noticed after each round i feel more and more vindicated with my purchase. I no longer leave feeling like a botched another round of golf. I kick myself every time i pull out my brand new overpriced popular driver and not having spent that money on the dark horse wondering how much better my drive could’ve been... if you’re a guy like me who loves hitting the course with Your buddies and business associates but hates sucking... but these irons.

Glenn Bedard
High quality

Like the consistent set up with the single Length
I don’t get out but 5-6 rounds per year so that has improved my ball striking

Dale Pruitt
New clubs

I really enjoy the new clubs from 1 Iron. It is nice to learn 1 swing for all of the irons. I really love the wedges.
Due to the steel shafts I did lose some yardage but after working with the irons I was able to get the yardage back.
I bought a full set for myself and my wife.
I bought the 3 and 5 wood for my wife also and she hits them great.
Great company to deal with.

Dennis Doherty
Learning My Clubs

I'm not a great golfer and the golf swing is not a natural motion for me. I do want to improve and feel a better set of clubs will help me. It makes sense for me to simplify my swing with the single length clubs. I've had them a short while and I'm happy with my progress. They are well made and a good value. I'm getting more distance and a better flight. I'm learning the clubs and I've not made a drastic scoring improvement yet but I'm confident I'm going in the right direction. The three woods set is next for me. Adding those to my 5-PW set and the three additional wedges. The clubs *feel* good so I think I'm making good choices. Now, if I can only learn to spin those wedges.