Product description Masonry drill, diameter 80 mm. Core drill with six cutting inserts made of high quality sintered carbides brazed to steel body with brass. Hex handle 13 mm with M-16 thread. The depth of the crown is about 50 mm. Central replaceable pilot drill Ø 8 mm. The outer surface is helically milled to allow the material to flow better from the drilled hole. Designed for professional installation of electrical wiring boxes in brick or concrete walls. Parameters Purpose: Concrete, silicates