RUKO-106-340-8-Piece-HSS-Bi-Metal-Hole-Saw-Set-with-Variable-Toothing-RUKO-106340-p-The-RUKO-HSS-bi-metal-hole-saws-in-this-8-piece-set-have-varied-tooth-spacing-&-are-suitable-for-unalloyed-steel-up-to-700-N-mm-sup 2-strength-non-ferrous-&-light-metals-plastics-plasterboard-&-light-building-boards-fibreboard-plywood-&-wood-They-are-particularly-suitable-for-use-with-h&-drills-pillar-drills-&-lathes-p-RUKO-106340-HSS-Bi-Metal-Hole-Saw-Set-With-Variable-Toothing-8pc