Ruko HSS Spiral Fluted Step Drill Bit with Split Point, Bright Finish, 4.0 12.0 mm Diameter, Size 0/9, 65.0 Length, R101050 9

ManoMano

Size No. 0/9. Drilling range 4.0 - 12.0 mm. NEXT GENERATION - with this robust tool, sheets can be centered, perforated, drilled, and deburred in a single operation. The spiral clamping groove and depth provide quiet operation and high cutting power. In particular, the chips that do not break are cleanly removed, as is the case with a spiral drill.

Amazon

Point Cutting with split point DIN 1412 C Perfect for sheet metal up to 4 mm The rectificado CBN and design of the shavings so Spiral, Output Channels ensure optimal cut without noise, vibration or rebabas