Jig Now Includes Drill Bit, Stop Collar, and Stop Collar Wrench for Added Convenience!This is an incredibly affordable doweling jig for woodworkers who want a quick joint without a lot of fussy layout. Many doweling jigs require that you make a mark on the inside edge of the joint, meaning you either have to transfer marks from the face to the edge, or measure and mark with a tape measure. Since this jig is transparent, layout is much simpler. Just set the two parts together and strike a line across the center of the joint. The see-through reference lines allows you to line up the jig perfectly. Clamp it in place, drill and you're done!Also Available from Rockler:Rockler 1/4" Dowel Drilling JigRockler 1/2" Dowel Drilling JigHardened steel drill guide will endure years of abuse.Holes are spaced 3/4" on center.Convenient hanging holePrecise centerline for the joint, plus center lines for two dowelsMeasures 2" x 4-1/2"Drill guide is 3/4" thick, perfect for 3/4" face framesJig is designed to center dowel holes on 3/4" thick stock.Jig includes Drill Bit, Stop Collar, and Stop Collar Wrench