EXTRA LONG 450MM SDS DRILL SET These 5 Pieces SDS EXTRA LONG 450MM Drill Bit Set is suitable for drilling into concrete, light weight block and stone.Made from a combination of chrome vanadium steel and YG8 tungsten carbide, these drill bits offer excellent durability and performance. They feature a quick change SDS shank, which fits into a spring loaded chuck, and is especially designed for hammer drilling applications into stone and concrete with a masonry drill.Set contains 5 drill bits in 10mm, 12mm, 16mm, 18mm and 20mm sizes. SDS qiuck changeLong drilling depth of 450mmIdeal for drilling into concrete, light weight block and stone5PCS SDS Drill BitsSet Size: 10/12/16/18/20 x 450mmTip YG8 tungsten carbideMaterial: 40CR, sand blastedHardness- Body: HRC45 - 48- Tips: HRC 87 - 90SDS plus connectionPacked in strong tool case for easy, safe storage and transportation + mail box packing.