The first-ever Studio Stock 28 Slotback was designed to offer an impressive crossover between blade and mini-mallet. Robert Bettinardi worked with his PGA Tour staff, specifically Matt Kuchar since 2003 to perfect the Armlock putting technique. The 2019Â SS28 Armlock version is refined model from his popular SS28 Armlock model with a milling a slot in the rear flange in order to frame the ball perfectly and allow for maximum forgiveness at impact. The SS28 SB Armlock was engineered with a single bend shaft and square profile with greater perimeter weighting and higher MOI characteristics. With feedback from major champions, Robert Bettinardi milled his F.I.T. Face 20% deeper for an even softer feel at impact. A stunning hand-polished platinum finish gives the SS28 SB a durable and clean appearance, sure to inspire confidence on the greens!