For deburring heavy-duty materials. The two-insert tool for double-edge deburring on heavy-duty materials. Stays sharper longer, and can be used repeatedly. Supplied with a built-in hand guard for worker safety. For all thicknesses up to 14mm (0.56”). This set contains Blade holder Burr-Bi, 2 universal blades R10, Handle A, and key. Blades can be positioned in 2 ways for single and double straight edges.