Features: *Diameter in 6/8/10/12mm drilling size. *Triangle shank for better bits clamping. *Made of high carbon steels and Tungsten Carbide Tip. *Fits all impact drills with 0~13mm 3-jaw chucks. *Use for masonry light concrete, limestone, natural and artificial stone. Specifications: Product Name: Impact Drill Bit Material: Alloy Color: Silver Optional Size: 6x300mm, 8x300mm, 10x300mm, 12x350mm Suitable for: Drilling to masonry light concrete, limestone, natural and artificial stone Quantity: 1Pc Package Contents: 1 × Impact Drill Bit Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data.