Jessem Model 08350 Dowelling Jig Master Kit Includes Accessories for Drilling 1/4", 3/8" and 1/2" Dowels Create 1/4", 3/8" and 1/2" (3/8" drill bushings and drill bit included) dowel holes Locations of dowels can be pre-set in 1/8" increment Built in alignment slot Included are (5) 3/8" drill guides, 3/8" drill bit, 3/8" stop collar, and 3/8" indexing pin.