Sutton D6100550 5.5mm x 85mm Multi-Purpose Drill Bit Tungsten Carbide TCT Suitable for drilling in various materials such as timber, concrete, brick, stainless steel, cast iron, steel & glass. Especially suited for drilling multi laminated construction materials. Drilling masonry materials prior to wood or steel will dull tip reducing the cutting performance. Features Hammer Action: For masonry materials only. Rotary Action: For all other materials. Specifications Part number: D6100550 Diameter (d1): 5.5mm Flute length: 45mm Length (l1): 85mm Plug colour: Red