Hand Tools
3/6pcs Countersink Drill Bit Set 1/4'' Hex Shank HSS 5 Flute Countersink 90 Degree Wood Chamfering Cutter 6mm-19mm Wood Drilling
3/6pcs Countersink Drill Bit Set 1/4'' Hex Shank HSS 5 Flute Countersink 90 Degree Wood Chamfering Cutter 6mm-19mm Wood Drilling
https://www.bizrate.co.uk/handtools/3-6pcs-countersink-drill-bit-set-oid27628943069.html