Unlike the smooth, quick release of Urethane thumb products, Vinyl offers a more textured feel for slower release. Our Vinyl thumb products are made from a comfortable blend of material that makes them easy to drill, cut, bevel and sand without the use of 1 1/8 outside diameter: 51/64 through 61/64. 1 1/4 outside diameter: 31/32 through 1 1/16