Well you get what you pay for. but in this case the price didn't affect the quality and it worked great for our application of cutting a hole in our clay pots. You won't be disappointed!
Pros
APPLICATIONS - Ideal for drilling glass, ceramic, porcelain, ceramic tile, porcelain stoneware, limestone, slate, marble, granite, light stone and fiberglass. (Must be used at low speed; always use lubricant (water) when cutting or the hole saw will burn through.)