The Milwaukee 48-13-7249 1/2 in. Installer Drill Bit features metal construction for durability and coated flutes for fast chip removal. The bit design includes an aggressive tip geometry for quick cutting. Milwaukee's Bell hanger bits are ideal for installing all types of small wire systems including computer, security, ph1 and cable. With 12 in., 18 in. and 24 in. L they provide extra reach where needed and a hole in the tip to help pull wires through holes. Non-stick coated flutes increases chip ejection and reduces binding. An aggressive tip geometry provides faster cutting and the 3-flat shank stops the bit from slipping in the user's drill.