Morse CTS02 (166737), 9 piece, electrician carbide tipped hole cutter kit. Common diameters 7/8"(22mm), 1-1/8"(29mm), 1-3/8"(35mm), 1-3/4"(44mm), 2"(51mm), 2-1/2"(64mm). Kit includes one (1) each of replacement parts CTSP(166010) stepped pilot drill, CTSS(166027) ejector spring and hex key.