uxcell Metric Machine Tap M2 x 0.4mm H2 High Speed Steel 3 Straight Flutes Screw Tapping Threading Machinist Repair DIY Tool 2pcs

I was surprised at how small these were. They did not come close to fitting in the small collet that came with my tap set. I found a pin vice that went down to 0.00" and that worked, although I wouldn't want to try that on metal. For acrylic it's fine.

Good tool could not find anywhere great for rc cars

I had a need to tap some M2 holes in the frame of a On30 model. No doubt it is delicate, I only advanced a 1/4 turn at a time, backed out every full turn, and dabbed a q tip with mineral spirits to clean out chips. All went well.

I build small DIY electronics projects and also mounting 2.5 & 3.0MM screws and stand offs. This tap does the job. I used it on plexiglass, tin, and soft medals. I used nonmetric drill bits to start the holes. You get two tap for the price.

worked as it should

I just had to tap a few deep holes in plastic, so these taps worked out just fine for me.

Used once so far. Worked very on stainless steel.

I ordered this to tap out a CZ 97 for a Picatinny rail. The gun is made of stainless steel. It did the job perfectly!

Easy peasy