uxcell10pcs Tungsten Carbide Drill Bits 0.3mm for Engraving PCB Circuit Board Micro Drill Bits 0.3mm Shank 1/8" Shank

I use these to replace broken pivots in tiny clock gears. It’s necessary to make a .006” dia hole in the hardened steel arbor and the drill does it perfectly

A pesar de lo extremadamente delgadas, pude barrenar unas piezas de latón y cumplir las especificaciones de nuestro cliente

Great bits, well made, fragile as all these small bits are but these seem better than most.

Great bits, used to probe PCB blanks and it works great for that. I did a little drilling with them and tolerance seems acurate, but be careful as they do break easily, use a really low plunge speed. They’re packed well unlike other bits so they won’t bump around and break during shipping.

Good quality. Good for manual or powered drilling (modeling)