Axcaliber lock mitre cutter head bits are ideal for milling mitre joints in max 29mm stock. The quick and easy way to accurately create boxes, stretcher bars, frames and any assortment of right angle or parallel joint projects. To produce perfectly fitting 45° mitre joints in two steps: first with the workpiece in horizontal position and then with the workpiece in vertical position. To mill sturdy parallel glue joints in two steps: first with the workpiece in horizontal position with the inside face-down and then with the inside face-up. Cutting diameter 140mm, bore size 30mm.