... plasterboard, brick, normal hardness ceramic,tiles, concrete wall with alloy base and carbide tipped pilot drill in kits. ... fit hole saw 73,83,93,103,113mm with hex screwAl Alloy Base to fit hole saw ... ,43,53,63,67,73,83,93,103mm with hex screwCarbide Tipped Arbor Drill Diameter 9.5mm ... length 135mm with hex shankCarbide Tipped Arbor Drill Diameter 9.5mm x Overall length 145mm with SDS-plus shank ROUGH ...