Drill straight, accurate holes without a drill press using the Kreg Drilling Guide. Features hardened steel guide holes and easy to read markings for major drill bit sizes: 1/2", 3/8", 5/16", 1/4", 3/16" and 1/8". The stair-step bottom of the guide is self-centering on the edge of 3/4" and 1/2" material. Additional features include built-in alignment marks, a chip relief channel and a GripMaxx anti-slip bottom. The ergonomic grip will keep you reaching for the Drilling Guide whenever you need to accurately drill straight holes.Features: Ergonomic grip with built-in alignment marks Hardened steel drill guides and easy to read markings Precisely positioned holes with just a hand drill Stair-step bottom with chip relief channel is self-centering on 3/4" & 1/2" material GripMaxx anti-slip bottom Specifications: Six major drill bit sizes: 1/2", 3/8", 5/16", 1/4", 3/16" and 1/8" What's Included: (1) Kreg Drilling Guide