Cle-Line C20501 135° Double End Drill Bit 3/16 in HSS Steam Oxide

135° Split-Point Double-End Bit

The Cle-Line C20501 is a 3/16 in high-speed steel drill bit designed for maintenance and fabrication tasks where a replaceable cutting end extends tool life. Its 135 degree split point starts cleanly on metal surfaces without a centre punch. The steam oxide finish adds lubricity and resists rust during storage. Mechanics and machinists who need a short, rigid bit for handheld or drill-press work will find it fits standard 3/16 in chucks.

Sustained Drilling Behaviour

High-speed steel retains hardness at the temperatures reached in repetitive holemaking, so the cutting edges stay sharp longer than carbon steel when drilling mild steel or aluminium. The 17 mm flute length clears chips efficiently in shallow holes, reducing heat buildup during repeated cycles. Black oxide surface treatment holds cutting fluid, further lowering friction during extended use. The double-end design lets the operator flip the bit when one end dulls, effectively doubling productive time before replacement.

3/16 Inch Shank Diameter

The shank measures exactly 3/16 in, matching the drill diameter, so the bit seats fully in any 3/16 in keyless or keyed chuck without an adapter. This single dimension determines whether the bit can be used in the intended driver or drill press. Builders needing a reduced shank for smaller chucks or a larger diameter for heavier feed pressure must select a different part number.