I have this mandrel with a 1 3 /8" Bought the Klein Hole Saw about a month and a half ago. Today I had the opportunity to use it for the first time to drill a hole in sheet steel less than 1/16" thick. The board broke immediately So I had to rush to Menards to buy another one that would allow me to make a hole in seconds.I've never bought a Klein tool so I'm not sure if this is typical Klein quality or if I just have a defective one Unfortunately it's been a month so I can't return to Revain.