28320 Features: -Spear drill. -Material: Tungsten carbide. -Ideal for drilling, cutting, separating fiberglass reinforced plastic, thermosetting plastic, non-ferrous metals and drilling into pearls and corals. -Shank size: 0.09". Number Of Bits: -2. Unit Material: -Steel. Use Material: -Metal/Most Materials. Product Type: -2 Cutter Drill Bits. Use: -Cut Out Tools/Drill Bits. Generic Dimensions: -Overall dimensions: 0.39" H x 3.54" W x 3.14" D, 0.2 lbs. Dimensions: Overall Product Weight: -0.2 Pounds.