Diamond Core Drill Bit Set 38-117mm for Masonry – 3 Bits + Arbors. Tackle masonry drilling projects with a dedicated dry diamond core drill bit kit designed for holes from 38mm to 117mm. This set includes three core drills sized 38mm, 52mm and 117mm, each engineered with a high diamond concentration to deliver longer life and greater strength. The drills feature a slotted barrel to aid waste removal for cleaner and faster drilling. You’ll also receive a 200mm hex and SDS arbors, plus an A-taper pilot drill to help you get started with precision. All components come in a sturdy carry case, making storage and transportation simple whether you’re on-site or in the workshop. Important usage note: not to be used on hammer action. Ideal for masonry work, this kit is a practical solution for projects requiring accurate, reliable dry core drilling. Pack contents: 38mm, 52mm and 117mm diamond core drills, 200mm hex and SDS arbor, A-taper pilot drill. Suitable for masonry substrates; shank type is hex. Useful for professionals and DIYers seeking durable, long-lasting core drill bits in one compact set. 38mm, 52mm & 117mm diamond core drills, 200mm hex and SDS arbor (1), A-taper pilot drill (1). Set or Single Item. We go above and beyond to ensure you receive the best level of service.