Yakamoz 2Pcs 1/4 Shank Top and Bottom Bearing Guide Flush Trim Pattern Router Bit Set Woodworking Cutter Tool with 10 Pcs Top Mounted Replacement Bearings

Using this to drill holes in 3D prints for M2 and M3 screws. Sturdy little tool for precise work. Would recommend.

I used these to route mdf using a template guide. On first use, the ball bearing literally fell apart and flew off, leave a huge gouge into my template and desired workpiece. With that said, the cutting edges are as good as most premium router bits. Paint is atrocious and flakes off. these are quite wide, so youll want to have your router set to its highest rpm (if its variable) as the bit will want to jump and skip if the router is spinning too slow.

The drill doesn’t even drill through my 2mm work piece, pretty disappointed