5pcs Countersink Drill Bit Set Counter Sink Drill Bit for Wood HSS High Speed Steel Center Spotting 60 Degree Angle Countersink 1.5/2.0/2.5/3.0/4.0mm

FUNCTION- Center and spotting drills are traditionally used to make a conical hole for a lathe center in order to make a starting point for a standard twist drill, designed to prevent the twist drill from walking. DESIGN- Each drill has a double end and is ground with a standard 60 degree included angle. FIT- Used for producing center holds in components or work pieces with require machining between centers. MATERIAL- Material: HSS, Applicable hardness: HRC40 or less. SIZE- The set includes 5 each sizes: 1.5mm drill tip diameter with 5mm body diameter and 35mm body length & 2.0mm drill tip diameter with 5mm body diameter and 41mm body length & 2.5mm drill tip diameter with 6mm body diameter and 45mm body length & 3mm drill tip diameter with 8mm body diameter and 51mm body length & 4mm drill tip diameter with 4mm body diameter and 10mm body length 60.