Router Bit Guard - Large Size Mounts directly to router table fence with standard 1/4" x 20 hex head bolts. NOT INCLUDED Measures; 5-3/4"W x 3-1/2"H x 2"D Vertically adjustable for the router bit height. Allows you to see the router bit and work piece while you make your cut. Available in two sizes - Small or Large - Each sold separately.