Introducing the Ultimate Doweling Jig Kit by POWERTEC. This impressive set of doweling jigs delivers was put together to provide you with everything you need to create strong joints and self-centering drilling holes in the least amount of time. This kit gives you the ability to join thick material with the larger jigs, but does exceptionally well with the smaller sizes allowing you to join material as thin as 1/2 in. There's no-longer a need to transfer marks from the face to the edge or mark and measure with tape. The dowels are perpendicular to the mating edge, resulting in edge joints going together at perfect right angles without special clamps. Although this exclusive POWERTEC kit offers a straight-forward, no-nonsense approach, we don't leave anything up to the imagination, as we provide you with detailed "how-to-use" instructions. Whether you're a beginner or experienced woodworker, you'll find this complete set of jigs, drill bits and stop collars easy to use and highly convenient. Complete Doweling Jig Kit Contains: (1) 1/4 in. Doweling Jig, (1) 1/4 in. cobalt drill bit, (1) 1/4 in. stop collar, (1) 3/8 in. Doweling Jig, (1) 3/8 in. cobalt drill bit, (1) 3/8 in. stop collar, (1) 1/2 in. Doweling Jig, (1) 1/2 in. cobalt drill bit, (1) 1/2 in. stop collar, (1) Hex key for stop collars, (1) Hard shell case. Material: Acrylic.