For heavy-duty deburring of materials with single or double straight edges up to 0.56” (14 mm) thick. Holder can take two R10, R20 or R30 blades for arc shape finishes on workpieces up to 0.63” (16 mm) thick. Handguard attached for worker safety. Supplied with 2 x R10 baldes. R10 Blade: “A” side for spiral chips, “B” side for powdery chips.