The Concealed Hinge Jig works with an ordinary drill and the included carbide tipped bit. The Concealed Hinge Jig allows you to drill cup holes for concealed cabinet door hinges (sometimes called Euro hinges) using just a drill. The jig positions an included carbide-tipped bit exactly at the proper position and offset, and drills to the perfect depth every time thanks to depth stop collar. The jig is simple to use, and it ensures that you can mount cabinet doors that fit great and work properly. Concealed hinges are great for mounting cabinet doors because they stay out of sight, theyre adjustable, and they work very well. Mounting them, though, requires drilling a large hole at a very specific position and depth. The Kreg Concealed Hinge Jig takes the guesswork out of drilling those holes, and allows you to do it with nothing more than a drill and the carbide-tipped bit that comes with the jig. Note: A 1/16" bit is required to drill for hinge-mounting screws. Not included. The Concealed Hinge Jig consists of a glass-filled nylon base with a hole that receives a drill guide. Indexing cams ensure that the jig positions the bit to drill a hole at the required offsetwhich is dictated by each hingeand a built-in stop collar ensures that the cup depth is correct every time. There are even holes that you can use to guide a bit for hinge screw holes. The Concealed Hinge Jig comes with a high-quality, carbide tipped bit to ensure great results. The Concealed Hinge Jig is designed to be intuitive for beginners to use, but robust enough for professionals. Just pick out your hinges, look up a few basic mounting instructions that come with them, and then set up the Concealed Hinge Jig by adjusting a pair of built-in cams. After that, youre set to drill hinge cup holes using any ordinary drill. Whether youre installing one cabinet door or making doors for an entire kitchen, the Concealed Hinge Jig provides reliable, consistent results.