The 9 Piece Dust Management Core Drill Kit.Provides the user with a diamond core drilling system capable of drilling in masonry up to 3 times faster than an equivalent slotted core drill.Solid barrel dry core drills should only be used with an adequate dust extraction system; core drills used in this way can drill in excess of 300% faster than their slotted equivalents.DCX90 Dry Core Drills are ideal for plumbers, builders and general tradesman.MEXCO dry core drills should be used in conjunction with a minimum 850W drill motor fitted with a slipping clutch.Supplied in a durable case. Contains:3 x Solid Dry Core Drills:38mm, 52mm, 117mm1 xDust Swivel Unit1 x Extension Bar150mm1 x SDS Adaptor80mm1 x Hex Adaptor80mm1 x A-Taper Pilot Drill175mm1 x Drift Key