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This cutting bit is good at cutting only thin ceramic tiles such as ceramic wall or counter tiles, not the typical thicker floor tiles. Note the packaging does not tout any claims as to special alloy. As the quality of the metallurgy is inferior than those made with molydenum-vanadium alloy, this bit is priced accordingly less. Be warned. The cutting metallurgy appears to be a harden steel-alloy instead of embedded diamond or silicon-carbide. Unless your ceramic tiles are soft, you may find yourself buying several cutting bit. Consequently, if you use it to cut many tiles, the bit won't last.
Roto Zip and anything to do with it are the greatest things since sliced bread. I'll buy again from this seller. This transaction and all my RotoZip transactions are fantastic.
This drill bit worked great. Made a lovely round hole in the tile just where I wanted it.
I use this in my Dewalt rotary tool (dw455)., I had to change the collet, no biggee. But again cannot be beat for cutting odd or radius shapes. Really does a nice on radius'. I freehanded some sink tiles, I have yet to master a straight cut but a tile cutter still faster anyway.
I don't use these bits for everyday work, so I can't really testify as to their durablity for that purpose. Love the RotoZip, a great tool that comes in handy in so many situations. What I can say is these bits make nice smooth cuts in ceramic tile. I have tiled both bathrooms in my house, the foyer and the kitchen, and have used only one bit.
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