jewelry settings

Review by R. Fox : generic diamond point bits for the dremel rotary tool

These generic diamond point bits work great on my dremel rotary tool and the price for 20 of them is cheaper than buying 1 bit of the dremel brand. I use them for engraving on glass and they have been great.

Review by Dave : Great value on rotary bits!

I would probably not use the description of "pro quality" to describe this set of bits, but at this price, one just does not expect tools to be of the highest quality. If you are not satisfied with the longevity of the these bits, just buy two or more sets and you still will come out ahead of the cost you would pay at other retail tool suppliers for similar items. In this case, "you get what you pay for" may be quite true, but you might ask if you need what you pay for. In this instance, if you are an amateur, you may not need the highest quality available. As an amateur who is less than an authority on heat and its effect upon diamonds and the adhesive materials used in their bonding process required to result in a high speed tool bits used at speeds exceeding 25,000 rpm, I do not believe a better value can be found. If you never exceed the speed limit, why buy a Ferrari? So I rate these bits with 4 stars because I know there are some better quality bits available, but at prices that are multiples of these. However, combining the needs of an amateur with the cost of these bits, I do not think you can do any better in value. I doubt that these bits would in any way diminish the quality of the result of your efforts.

Review by workerbee : OK for soft materials

The drill bits worked fine on soft materials such as seashells as long as I didn't put too much pressure on the bit. But on harder materials such as ceramic or stone, the diamond coating wore off very quickly, rendering the bit useless. And yes, I did use lubricant.