Makita D-06339 Metal Drill Bit HSS-G 4.0 x 75mm - Pack of 10

These HSS-G bits are optimized for metal and steel, and are capable of drilling aluminum and other soft metals. They’re also described as versatile enough for wood and plastic in light applications, though they perform best on metal.

Choose a 4.0 mm bit when your hole target is exactly 4 mm in diameter (for example, certain fasteners or pilot holes). If you need a larger or smaller hole, pick the corresponding size bit to match your requirement and the material you’re drilling.

Clamp your workpiece securely, mark a center point with a punch, use cutting fluid or lubrication on metal, start at a low speed, and gradually increase if your drill and bit allow. Apply steady pressure without forcing the bit, and periodically withdraw the bit to clear chips.

Insert the straight-shank bit into a compatible drill chuck, tighten securely (preferably with a snug fit, using a keyless chuck if available), and ensure the bit is perpendicular to the workpiece for clean holes.

Yes, it features a rust-resistant coating that helps protect the steel from corrosion, contributing to longer life in demanding environments.

Yes. The straight-shank design is compatible with most standard drill chucks found on hobby and professional drills.

Makita's HSS-G bits are known for durability, precision-ground tips for cleaner holes, straight shanks for reliable chuck grip, and a protective coating. The pack of 10 also provides ready replacements, minimizing downtime on jobs.

If you’re evaluating, you can compare with these nearby options on Fepy.com: https://fepy.com/product/makita-d-06338-metal-drill-bit-hss-g-4-0-x-75mm-pack-of-10 and https://fepy.com/product/makita-d-06339-metal-drill-bit-hss-g-4-0-x-60mm-pack-of-10. These are similar HSS-G bits with comparable sizes for metal drilling.

4.0 mm holes are common for lighter fasteners, pilot holes for larger taps, or precise drill-throughs in metal and some plastics. It’s a versatile size for small, clean holes in metalworking and quick-reference prototyping.

Verify the diameter (4.0 mm) and overall length (75 mm) to match your project needs, confirm it’s HSS-G for metal drilling, and note that the pack contains 10 bits for quick replacements during ongoing work.

The pack includes 10 high-speed steel (HSS-G) drill bits of 4.0 mm diameter and 75 mm length, with a rust-resistant coating. Given the tool-grade quality from Makita and the included quantity, it offers solid value for ongoing metalworking tasks where a reliable, repeatable hole size is needed.