ParalignTM Dowelling System The new dowelling jig from JessEm creates 3/8" dowel holes on the end or face of your work piece. Locations of dowels can be pre-set in 1/8" increment, perfect for creating multiple dowel hole configurations. Adjustable indexing stop allows you to drill dowel holes in series accurately and with repeatability. Constructed of 6061 aluminum, anodized for durability. Included are (5) 3/8" drill guides, 3/8" drill bit, (2) stop extension bars, 3/8" stop block and bushing locating pin. Maximum edge to center distance for dowel holes is 2" and clamping capacity of 4".