- 1/4" Hex Shank. - 90° Three Flute for countersinking/counterboring screw holes. - Each metal countersink bit is made of high quality M2 HSS material for extended drill bit life...
Keil Power Drill Bit Set | Drilling Screwing Spinning Power Tool | 19pcs and 25pcs HSS DRILL BIT SET 19PCS (1.0 - 10.0MM X 0.5MM) HSS DRILL BIT SET 25PCS...