The Faithfull Imperial HSS Drill Bit Sets are designed for cutting metal, however they are also suitable for drilling holes in timber, chipboard and plywood. The sets have an easy flip open action case with transparent front for easy checking of contents. Manufactured to meet DIN 338 standard. 7 Piece F7PSET: 1/16, 3/32, 1/8, 5/32, 3/16, 7/32 and 1/4in. 13 Piece F13PSET: 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64 and 1/4in. Ref: UTTK10743