Adjustable Hole Saw Guide

Had just been looking for something simple with a set of holes to help start a 1/4" diamond hole saw in granite. Found this instead but was a little concerned about no reviews (anywhere).Was pleased to find that there are a set of guide holes for smaller holes in addition to the large adjustable guide.Worked really well except for one thing - the holes are exact and the hole saw is a little larger (diamond grit), so I had to go up one size which made it a guide but not an exact one. Still worked great. Suction cup is really strong. I think will work great for other tasks as well.

it is great to guide drill bit on glasses.highly recommended to glass driller.