ZJchao Tungsten Carbide Drilling Engraving Review

There were no descriptions of bits in this order (e.g. cone, tip, etc.). This information is very important for its use in of the machine with CNC.

This is a good set of knives. I bought mine to expand some of the car window mount adjustment slots. They did a great job, quickly, and the extended cuts still looked "factory". This is better than any OEM bits I've bought for my RTX or Dremel.

Wrong description of shank size; it is not 1/8 inch. They are 2.973mm tall. Slipped right out of my DW660 after a hit. Returned, cannot be used. Despite the incorrect shank size labeling, they actually looked like pretty good bits, a Dremel 3mm collet should hold them well.

Strong rods won't bend or fail. They were used to turn 80% of AR blocks into subs. I'm very happy with this set of bits. I use them with a $20 replica dremmel with port cargo line Would buy again.