Honma Classic Putter, SL-001Effortless control for players looking for precise impact and enhanced visualization for Arc Style putters. Crank Neck: This unique shape suppresses push out during the stroke. Diamond Slit: Featuring a unique slit design that reduces contact area with the ball on impact, promoting forward rotation and ensuring a soft feel. Original TPU Insert: Designed specifically to optimize feel and pure roll while providing exceptional performance.