Features: As great bit accessory, features single hypotenuse chamfer 90 degrees Made of high carbon steel, heat-treated and tempered, and coated with titanium alloy for superior cutting strength. Used for steel, aluminum and other metals, plastics or wood. Enlarged or countersunk, deburred edges, 15 degrees chamfered The chamfering device is five-edged, the use of the process can be faster discharge of wood chips Chips will discharge from the hole on both sides of the drill top automatically, so the drill will not be clogged Specification: Material: bit is carbon steel, chamferer is 45 steel Surface process: titanium plating 6pcsoriginal color 6pcs Chamferer: 5 flute Drill bit: triple point Shank diameter :15.8mm / 0.6in Wrench size: 55 * 20mm / 2.2 * 0.8in Size (blade diameter * length * quantity) : 3 * 60 mm * 2 PCS 4 * 75 mm * 2 PCS 5 * 85 mm * 2 PCS 6 * 93 mm * 2 PCS 7 * 100 mm * 2 PCS 8 * 110 mm * 2 PCS 10 * 120 mm * 2 PCS Package list: 14 x Drill bit 3/4/5 6/7/8/10 (each 2 PCS) 2 x Wrench1As great bit accessory., features Single hypotenuse chamfer 90 degrees 2Made of high carbon steel, heat-treated and tempered, and coated with titanium alloy for superior cutting strength. 3Used for steel, aluminum and other metals, plastics or wood. 4Enlarged or countersunk, deburred edges, 15 degrees chamfered 5Chips will discharge from the hole on both sides of the drill top automatically, so the drill will not be clogged