Vise Urethane Bowling Ball Thumb Slug ? 100% Urethane, Easy-Carve Design Customize your thumb fit with the Vise Urethane Bowling Ball Thumb Slug. Made from 100% urethane, these thumb slugs are designed for easy carving, allowing you to achieve a quick, clean release for improved control and consistency in your game. Each slug measures 2-5/8? in length and has a hardness rating of 75, providing durability and a comfortable grip. Available in multiple drill sizes?1-1/8?, 1-1/4?, and 1-3/8??for a perfect fit. Choose from a wide range of vibrant colors to match your style. Key Features: 100% Urethane Material: Durable and easy to carve for a custom fit Quick, Clean Release: Designed for smooth and consistent performance Multiple Drill Sizes: Available in 1-1/8?, 1-1/4?, and 1-3/8? Length: 2-5/8? for complete thumb coverage Hardness: 75 for optimal grip and durability Color Variety: Yellow, White, Pink, Green, Orange, Blue, Purple, Black, Clear, Neon, Grape, and Red Specifications: Brand: VISE Material: Urethane Length: 2-5/8? Hardness: 75 Drill Sizes: 1-1/8?, 1-1/4?, 1-3/8? Slug Sizes: 1/2, 1/4, 1/8, 3/8 (various options) Colors Available: Yellow, White, Pink, Green, Orange, Blue, Purple, Black, Clear, Neon, Grape, Red Category: Slugs Inserts