ROUGH TCT HOLE SAW This hole is for cutting various wood, chip board,plasterboard, ... 2-9/16”)Overall LengthZinc Alloy Base to fit hole saw33,43,53,63,67,73,83mm with hex ... screwAl Alloy Base to fit hole saw 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 33,43,53,63,67,73,83, ...