STHIRA Steel 3-Point Woodworking Counterbore Drill

[Value Screw Tap Set ]--7pcs drill bits of various type, meeting you different tool needs. Including 7 HSS 5 flute countersink drill bit of 3/4/ 5/ 6/ 7/ 8/ 10mm.[Sturdy and Durable]--Designed for longtime service life. Constructed with high speed steel ,tiain coating and heat process treatment,superior cutting power.[Spiral Flute Design ]--Designed as five spiral flute, single flute edge chamfer 90 degree. for smoother chip removal, no stuck during work, easy to clean,making the workpiece smoother cut.[More Efficient Work]--No need for additional center drills or center punches! Great drill accessory for any work shop .[Work On Most Material]--Can be used on steel, aluminum other light metals, plastic or wood.