Hammer Spawn Black Solid 15 Undrilled Size:13 For use on all high-performance

For use on all high-performance bowling balls

Easy-On-Easy-Off Slip On Style

Technical Features:For the last decade

2 Reinforced Handles

Switch Grip™ is now the leading interchangeable thumb insert on the market and is sold in over 12 countries

Hammer Spawn Black Solid 15 Undrilled Size:13 For use on all high-performanceHammer Spawn Performance: High Core: Gauntlet Lane Condition: Medium to Heavy Oil Aggressive Transition Benchmark: The Hammer Spawn is designed as a high performance asymmetrical benchmark that allows bowlers to remain aggressive even as lane conditions transition. It effectively bridges the gap between the Black Widow 3. 0 Dynasty and the Zero Mercy Solid by delivering a unique combination of oil traction and powerful continuation. HK22C Solid