heres the 2 use the one with the ball on the end to make the first hole big enough for the second one to fit through and slowly work it .make a cicle with a marker first of the size you want an then just follow it..DO NOT push real hard let the dremel do most the work have it on full speed.My glass was 1/2" thick it took me about a half hour per hole so depending on your glass thickness there some sort of a time table for you .TAKE your time trust me.maybe do like 1 or 2 holes each night.here i found some pictures of them an there names.the first one is the one your gonna actually cut with an the second is the one to make the fist hole to start make sure the one with the ball on the end is a diamond coated one an big enough for the other bit to fit through.
1/8" Carbide Tile Bit - Compare to Dremel 562 - 1/8" shank - Bulk - Our Price: $2.97 - Retail $10.99 - Bulk Packaged 1/8 inch Carbide Bit for Cutting Tile, 1/8 inch shank. Compare to Dremel 562. For use with Dremel Rotary Tools.
the one with the ball on top i couldent find the right size same thing just get one with a larger ball on top
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