Tour-Proven Performance. With ARC geometry. The Spider ARC provides our highest MOI Spider putter for better stability and increased alignment and forward roll. Lightweight aluminum body paired with Heavy 304 Stainless Steel Ring for higher MOI to ensure that the face stays square to the path. Soft Suryln Pure Rollª Insert for Increased forward Roll and distance control. Spider ARC features a unique ÒARCÓ geometry for better ÒTrue PathÓ alignment. Spider ARC features a 3.65Ó heavy stainless steel ring for better MOI and an ARC geometry cup design for a better visual alignment. The Spider ARC has an easier connection for path with a combination of sightlines and a connect-the-dot alignment. Black Finish Shaft. SuperStroke GTR 1.0 Grip.