• Earn up to 5% on your order
  • 60 Day Love It Guarantee
  • 0% APR Finance Available
  • Price Match Guarantee

Callaway Big Bertha B21 Steel Irons

Condition:

Some visible signs of limited use, but is in fantastic shape and exceptionally well maintained. Close up, you may see some minor cosmetic blemishes

Currently unavailable.

To view all new and used options for this product click here.

Callaway

Big Bertha B21 Steel Irons Right CUSTOM 5-PW (Custom 25971) (Used - Excellent)

Callaway Big Bertha B21 Irons - Steel Shafts

You’re looking for more distance, and these irons are here to give it to you. In fact, Callaway have designed the legendary Big Bertha shaping with a NEW formula for distance and forgiveness any way you swing it. It’s a technology package that delivers more ball speed, higher launch and straighter shots for a new level of confidence that you didn’t think was possible. It all starts with the confidence inspiring shaping that makes Big Bertha so easy to hit. Generous offset, wide soles and a thick topline inspire confidence. But there’s even more under the hood.

This is the first time that the A.I.-designed Flash Face Cup is in a Big Bertha Iron. Callaway have created high balls speeds and increased spin robustness off of every club in the set, with a unique Flash Face architecture for each individual iron. A.I. Flash Face Cup wasn’t the only first, these irons also have a Visible Tungsten Energy Core (VTEC) which deepens the CG to make these irons incredibly easy to launch. Callaway have also provided outstanding feel at impact from the proprietary urethane microspheres. These microspheres are strategically designed to absorb unwanted vibration without reducing speed. In short, you’re getting the iconic shaping that you want to see over the ball with incredible ball speed technologies to get the absolute most out of your swing.

Callaway Big Bertha B21 Iron Features:

Fast Ball Speeds From The First A.I.-Designed Big Bertha Iron

Callaway's industry-leading Flash Face Cup in each club. Callaway have created high ball speeds and increased spin robustness off of every iron in the set with a sophisticated face architecture that’s unique to every loft. Ball speed is further enhanced by the 360 Face Cup that flexes and releases at impact.

Amazing Forgiveness From Legendary Big Bertha Shaping

This club profile that golfers love is engineered to give you more confidence over the ball with noticeably wider soles. For easy launch, lower spin and straighter shots, Callaway have added more offset. Combined with the Flash Face Cup, Callaway have developed a NEW formula for distance and forgiveness.

Higher Launch From Callaway's Visible Tungsten Energy Core

Callaway have added a significant amount of custom tungsten weighting to can deepen the CG in each iron with extraordinary precision, while still maintaining ball speed in the Flash Face Cup. Now you can get higher launch conditions through the set.

Pure Feel From Urethane Microspheres

Callaway's patented urethane microspheres comprehensively absorb unwanted vibration for exceptional feel, while also maintaining fast ball speeds.

NameLoftAvailabilityStandard LengthLieOffset (mm)Graphite Swing WeightSteel Swing Weight
#4 19° RH / LH 38.75" 60.50° 3.2 D0 D1
#5 22° RH / LH 38.125" 61.25° 3.05 D0 D1
#6 25° RH / LH 37.50" 62.00° 2.9 D0 D1
#7 29° RH / LH 37.00" 62.50° 2.7 D0 D1
#8 33° RH / LH 36.50" 63.00° 2.4 D0 D1
#9 38° RH / LH 36.00" 63.50° 2.15 D0 D1
PW 43° RH / LH 35.75" 64.00° 1.85 D0 D1
AW 48° RH / LH 35.50" 64.00° 1.5 D0 D1
SW 54° RH / LH 35.25" 64.00° 1.25 D0 D1
LW 60° RH Only 35.00" 64.00° 1.0 D0 D1

Get the Best Deal at JamGolf

We want you to get the best deal you can on golf clubs, clothing, accessories or anything else you find at JamGolf. To make sure this happens we’re willing to drop our price to match that of our competitors should you find the same item elsewhere with a lesser price tag. Of course, as always, there are some conditions attached to this offer but we want you to shop with JamGolf as we feel we are the best at what we do and our TrustPilot rating backs that up. We are currently the #1 rated out of 64 in the category Golf and #14 out of 604 in the overall category of Sport!

We didn’t get to the top of our field easily and staying here is a constant battle which is why we want you to have the best possible experience when buying new golf clubs or anything else from us. So, how do you go about price matching at JamGolf? If you find the same item for sale at a lower price get in touch and tell us where it is and, provided our criteria are met, we will match that price or give you £100 credit on your JamGolf Account.

Now onto those conditions:

  • The item should be identical
  • It should be in stock
  • No auction sites or online marketplaces
  • The price should not include any applied discount or voucher codes

If you have any questions about this offer or anything else to do with JamGolf give us a call at 03330 607141, email:[email protected] or use our live chat option.

Shipping Options

We use three courier services - DPD, Parcelforce and Royal Mail Special Delivery.

Most items will be sent via DPD.

Delivery Options

UK 5-7 Working Days - Free (On orders over £40*)

UK 2-3 Working Days - £5.95 (On orders over £40*)

UK Next Working Day (On orders over £40*, ordered before 2pm) - £6.95

*For orders under £40 a £2 surcharge is applied.

EU Shipping - Free on orders over £50 (£15 for orders under £50)

Please note any orders placed on weekends or bank/public holidays will be dispatched the next working day.

Be the first to get the latest offers

© 2025 JamGolf, Golf19, St Pierre Park Hotel Spa and Golf Resort, Rohais De Haut, St Peter Port, GY11FD · VAT No 419 8756 48

JamGolf (UK) Limited is registered in England and Wales No 14102237. JamGolf (UK) Limited is authorised and regulated by the Financial Conduct Authority and is the broker and not the lender. Our FCA registration number is 983304. JamGolf (UK) Limited offers credit products from Zopa Bank Limited trading as DivideBuy and Secure Trust Bank PLC trading as V12 Retail Finance. Credit is provided subject to affordability, age and status. Minimum spend applies. Not all products offered by Zopa Bank Limited trading as DivideBuy and Secure Trust Bank PLC trading as V12 Retail Finance are regulated by the Financial Conduct Authority.

Interest free credit agreements provided by Zopa Bank Limited trading as DivideBuy that are 12 months or less in duration are not regulated by the Financial Conduct Authority and do not fall under the jurisdiction of the Financial Ombudsman Service.

Zopa Bank Limited trading as DivideBuy is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority, and entered on the Financial Services Register (800542). Zopa Bank Limited (10627575) is incorporated in England & Wales and has its registered office at: 1st Floor, Cottons Centre, Tooley Street, London, SE1 2QG. VAT Number 281765280. DivideBuy's trading address is First Floor, Brunswick Court, Brunswick Street, Newcastle-under-Lyme, ST5 1HH. © Zopa Bank Limited 2025 . All rights reserved.