Aceteel M5x0.8 Tap & 4.2mm Drill Bit Set (Ti-Coated M2 HSS)

What people love (and don’t love)

What people love

High quality and durable tools that work well for drilling and tapping.
Accurately sized drill bits and taps suitable for various jobs.
Sharp drill bits and taps that cut hardened steel effectively.
Set includes all necessary pieces, making the process easy and convenient.
Works well for specific uses like updating firearms or installing sights.

What people don’t love

Some taps may have manufacturing defects, such as voids causing breakage.
Flutes on the supplied drill bit can be uneven, requiring testing before use.
A portion of users reported poor durability or breakage during tapping.
Minor quality inconsistencies reported among some sets.

Reliable and well-sized tap and drill set overall, but occasional quality issues warrant caution.

Summary based on customer review evidence.

Check price on Amazon

Quick facts

Brand: Aceteel
Price: USD 6.99
Rating: 4.00 (8 reviews)

If you need to drill the correct pilot hole and cut M5 x 0.8 threads without piecing together separate bits and taps, this Aceteel 2-piece set keeps it straightforward. It includes a Ti-coated M5 x 0.8 tap and a matching 4.2mm drill bit—ideal for quick repairs, hobby work, and light shop tasks.

You can view the current price and full details on Amazon here.

Both tools are made from M2 high-speed steel and finished with a titanium coating to help improve wear resistance and extend service life. The set is intended for use across a wide range of metals including copper, alloy steel, cast iron, aluminum, brass, and iron plate.

Includes 1 pc M5 x 0.8 Ti-coated tap and 1 pc 4.2mm Ti-coated drill bit
M5 tap dimensions: 58mm length; 21mm thread head; 5.0mm shank diameter; 4.0mm x 4.0mm square head
4.2mm drill bit dimensions: 74mm length; 4.2mm cutting diameter
M2 high-speed steel construction with Ti-coated finish for improved wear resistance
Suitable for many metals including copper, alloy steel, cast iron, aluminum, brass, and iron plate

For best results, match your setup to the tool style: the drill bit features a straight handle design, and the tap uses a square head (4.0mm x 4.0mm) for use with an appropriate tap wrench.