MULTIPLE APPLICATIONS: This self-centering dowel clamp is suitable for woodworking and is more suitable for creating different dowel joints, it can be used to make precise butt joints, miter joints and edge joints, as well as as a mortise and tenon, it is ideal for panel furniture Tools such as making some shelves, cupboards, desks, tables, repairing doors, installing railings Drill multiple precise holes quickly: Clamp the pin clamp with drill sleeve to the work piece to easily secure pins that require precise right angles and precise alignment; no measuring or calculations required; you can even go a step further and mark and align the clamp for perfection Effect There are 4 drill pilot holes on the top of the dowel jig, 2 of which directly accept 7/16" and 1/2" drill bits. The other 2 holes accept threaded replaceable steel bushings. Package includes 1/4" Drilled Bushing x 2; 5/16" Drilled Bushing x 2; 3/8" Drilled Bushing x 2 Easy to use: Large steel clamping screws tighten the pin clamp like a vise, and the aircraft-grade aluminum pin plate securely holds your work without damaging your application. Solid precision hardened steel center block construction brings ultimate strength and longevity; no wear when drilling. PRECISE POSITIONING: This drill is easy to adjust and can clamp to boards of varying thicknesses (clamping capacity: 7/16" to 2-3/8"), whether wood or round rods. Markings in the guide blocks and clamp hole dimensions are laser engraved.