POWERFUL HOLE SAWS: One Seven-piece set with shanks attaches to any power drill to cut round holes in glass, marble and other materials. CUTS THROUGH TOUGH SURFACES: Nickel-plated with a diamond dust coating offers superior performance and cutting strength. CLEAN AND ACCURATE HOLES: Cuts clean, perfectly round holes to a depth of approximately 7/8 inches. LARGE OR SMALLER HOLES: Set of 7-Pieces includes 4, 6, 8, 10, 11.5, 16, 17.5-mm sizes for small, medium and larger holes. VERSATILE: For use on wood, porcelain, glass, tile, ceramics and other surfaces.
I like them but the job they did on glass was just soso. Left jagged edges. On plastics it is perfect. Clean bores no edges. So I would say middle of the road 3 stars at best read more ยป
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