Wolfcraft 2970405 8 Pieces Doweling Centre Set Dowel centers allow you align dowel holes in drilled Parts, accurately marking the drilling location in mating material 8 piece set includes two dowel centers for 1/4, 5/16, 3/8, and 1/2-inch holes Internal centering pin locates center of dowel for accurate drilling Scribe point transfers mark for accurate drilling position Made from precision-machined metal