You are Buying a Brand New And Factory Sealed Milwaukee 2-1/8 in. High-Speed Steel Self-Feed Bit.....  Milwaukee Selfeed drill bit is coated with a rust inhibitor. Built to last and designed to perform, these Selfeed bits are re-sharpen able so you can keep them cutting like new. 2 feed screws are included. Minimum chuck size of 1/2 in. Drills large holes in wood. High-speed steel coated with a rust inhibitor for strength and durability. Removable and replaceable feed screw and the cutting edges can be sharpened. Faster, more accurate drilling: center feed screw pilots the bit and allows the bit to pull through fast