... "-7")Working Length: 107-550mmConnecting Rod For Hammer Core Drill bit(SDS Plus Shank, SDS Max, Long Hex, Square), ... .Long tool life.complete with locating plate and carbide tipped pilot drill.Ideal for cutting wood, plastics, fibreglass, bricks ... 8pcs Carbide Tipped Hole -making Drill in Wooden BoxSizes:16,20,22,25,28,30,32,35mm CARBIDE TIPPED CORE DRILL BIT