Item Type: Electric Hollow Core Drill Bit Shank Material: High Carbon Steel Material Color: Silver Size: Approx.155mm/6.1in Suitable For: The connection between the electric hammer and the impact drill. Also the drill hole opener convert. 1,Main Application: The shank is mainly used to connect the equipment like electric hammers, and impact drills. Also the drill hole opener convert. 2,High Carbon Steel Material: The shank is made of advanced high carbon steel material, which is heat treated and appearance treated, giving the product a long life span. 3,Reasonable Structure: The combination of round alloy blades makes each blades evenly stresssed and makes sure that they have little chance to drop. 4,Precise Welding: The adaptation of the high frequency welding technology makes a tight weld opening, which comes with a slip weld opening and a beautiful appearance. 5,Impact Equipment Accessories: The product includes 1 connecting rod, 1 drill bit, 1 hex wrench, and 1 nut. The combination makes the system work successfully.1 x Connecting Rod 1 x Drill Bit 1 x Hex Wrench 1 x Nut