HSS-Tin-Drill-Bit-Set-19-Piece-Metabo-627156000-p-The-Metabo-HSS-Tin-Drill-Bit-Set-is-suitable-for-drilling-steel-&-cast-steel-alloyed-&-unalloyed-grey-cast-iron-non-ferrous-metals-&-plastic-up-to-900-N-mm-sup 2-tensile-strength-The-bits-are-coated-with-a-titanium-nitrate-alloy-with-a-ground-cylindrical-type-N-135-deg-crosswise-grinding-tip-&-gold-coloured-surface-finish-p-p-They-are-NOT-suitable-for-aluminium-p-p-They-are-supplied-in-a-metal-tin-&-it-contains-one