TEMO30 pc 1 mm (1/32 Inch) Coarse Diamond Coated Burrs Glass Drill Bit Set Grit 80 with 1/8 Inch Shank for Dremel Rotary Tools

Very good, suppose I should have read description more closely, there’s really only about three I can use for drilling holes in pendants,

Not fully in use yet as the summer has arrived, but looks good to me.

UPDATED from my first review on my first order: I was premature in my excitement with my first order. I wrote my first review, and ordered a second set based on the first bit I used. It was fantastic. However that experience has not been the case for other bits in the package. I can almost tell which ones will be more successful by feeling the tip. Many are quite smooth, and the ones that feel rough do work but only for 2...maybe three holes (though 2mm glass!) My search continues for quality bits. I am prepared to pay more - they are out there somewhere!!!

I bought these to drill small holes into borosilicate glass to adhere silver bails into to make glass pendants. They work well but one already broke on the first day of use. Maybe I was pushing too hard but it snapped right at the start of the diamonds. So it seemed like a weak spot. The only product I have liked more was Lee Valleys diamond bits but this were a great alternative, because LV doesn’t sell a pack of one size, only variety packs. Would buy these again.

Worked well for glass, man made materials and softer stones but broken easily when drilling into harder stones like quartz and agate.Overall good as advertised.