Milwaukee 49-56-4253 Hole Saw Carbide Tipped 4-1/4-Inch The product is easy to use The product is durable The product is manufactured in United States 4-1/4 in. (108 mm) diameter 1-1/2 in. depth of cut Carbide-tipped 3 teeth per inch design Sturdy 3/16 in. thick steel back