Form either E or L joints in timber up to 32mm(1.1/4") thick. This aluminium extrusion jig slides on steel bars and the bushes are made from hardened steel and are replaceable. A clamp is provided on the main part of the jig for holding the timber during drilling and also a second clamp for securing the boards together whilst the position of the jig is being adjusted. Holes are drilled in both boards at the same setting so an accurate line-up guaranteeing. This jig produces an excellent result. Accommodates 6mm, 8mm and 10mm dowel holes. Supplied with hardened steel bushes for 6mm, 8mm and 10mm dowels.