Hex Shank: Avoid drill bit sliding off collet. Broad Blades: Keep the drill bit straight as it bores. Hollow Center Flutes: Clear chips quickly out of holes, creating deep holes quickly and cleanly. Self-Guide Direct Thread: Make it easier, faster and more accurate when drilling in the hard/soft wood. Product Name: Auger Drill Bit Color: Silver Weight: 125g Material: High Carbon Steel Cutting Dia.: 12mm / 0.5 inch Shank Width: 9mm / 0.4 inch Drill Depth: 16cm / 6.3 inches Total Length: 23cm / 9 inches Package Contents: 1 x Auger Drill Bit 1 x Plastic Bag NOTE: Please do not apply this auger drill bit to metalwork like reinforcement bars.