... board,plasterboard, brick, normal hardness ceramic,tiles, concrete wall with alloy base and carbide tipped pilot drill in kits.Max cutting ... -9/16”)1134-1/265mm(2-9/16”)Overall LengthZinc Alloy Base to fit hole saw33,43,53,63,67,73 ... 33,43,53,63,67,73,83mm with hex screwAl Alloy Base to fit hole saw 73,83,93,103,113mm ... with hex screwAl Alloy Base to fit hole saw 33,43,53,63,67 ...