This 152 X 150mm Diamond Core Drill Bit 406549 is an ideal addition to anyone's tools , whether it be for the garden , garage or DIY Diamond Core Drill Bit 152 x 150mm Heavy duty steel body core drills with diamond dust cutting segments Ideal for dry 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- 406549 5055058104366 .