You are Buying a Brand New And factory Sealed Milwaukee Model # 48-20-5412, 2-5/8 in X 11-3/8 in One Piece SDS-MAX Core Bit.... Core bit cut with the outer cutting edge only. The inside core must be removed to allow for deeper hole drilling applications beyond 3". Centering bit 48-20-5495 (included) is recommended for exact spot drilling and to avoid bit wandering during use. The drift key 48-20-5497 (not included) allows for easy removal of the centering bit. The one piece core bits are available in SDS-Max or Spline shanks, ranging from 1-1/2" to 6" diameters and overall lengths of 11-3/8" or 22", with a drilling depth of 3". Drift key (48-20-5497) sold separately for easy centering bit removal. Ideal for brick, block, and concrete. applications. Drilling depth of 3. Designed for SDS Max rotary hammers. Asymmetrical and Alternating Teeth for up to 20% faster drilling speeds. Thick-Wall Core Body for Durability Even in Large Hammers. Includes one 48-20-5412 Milwaukee 2-5/8 in. x 11-3/8 in. 1-piece SDS-MAX core bit.....