TCT-Hinge-Boring-Bit-35mm-x-60mm-Faithfull-FAIHBB35-p-The-Faithfull-Hinge-Boring-Bit-with-a-Tungsten-Carbide-cutter-is-designed-for-repetitive-drilling-of-blind-holes-when-fitting-concealed-Blum-hinges-in-kitchen-bedroom-&-bathroom-cabinet-doors-They-are-suitable-for-use-on-all-natural-woods-&-man-made-materials-such-as-blockboard-melamine-faced-boards-chipboard-&-MDF-&-provide-a-long-working-life-p-p-These-bits-should-always-be-used-with-a-st&-mounted-drill-p-p-Fe