100% New and High Quality. Made from high quality material Perfect for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc. Heat treated and highly polished. Drills perfectly round holes in steel, brass, plastic, wood etc. 3 sided shanks order to prevent slippage when in chuck. Two flute design drives faster, smoother and cleaner cuts each step is clearly labeled with the depth diameter in steps Function: Deburring, Chamfering, Cutting or expanding holes Supporting tools: drill, Hand drill, Charging drill, Bench drill. (Water injection cooling while working, it can effectively extend the service life of the drill bit, especially in the case of continuous drilling) colour:Golden Material:High speed steel size:9 x 13 x 2.5cm Package Contents: 3 x Step Drill Bit 1 x Center Puncher Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the