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to countersink in aluminum, copper, brass, steel, plastic and wood suitable for using with hand and power drill sizes: 12 - 16 - 19 mm material: HSS 4241 | hardness: 61 - 63 HRC drive: 6.3 mm (1/4") outer hexagon, Manufacturer: BGS technic
to countersink in aluminum, copper, brass, steel, plastic and wood suitable for using with hand and power drill sizes: 12 - 16 - 19 mm material: HSS 4241 | hardness: 61 - 63 HRC drive: 6.3 mm (1/4") outer hexagon, Manufacturer: BGS technic