This 45mm TCT Core Drill Bit is an ideal addition to anyone's tools, whether it be for the garden, garage, or DIY. It features a heavy-duty steel body with TCT cutting tips, perfect for cutting clean holes in masonry. Use with 1/2" BSP compatible arbors and drills equipped with a safety clutch. Do not use with drills set in hammer action. Warranty: LIFETIME for all hand tools; 3 YEAR for power tools, air & petrol tools. Silverline-Tooltime 509115.