CK Tools Sheet Steel Hole Saws - CK Tools T3202 022, This 22mm sheet steel hole saw from CK Tools has been designed to produce a smoother cut, making it ideal for both the professional and DIY enthusiast. Equipped with thinner material so the holesaw has less material to move for a quicker performance - it automatically ejects the slug removing the need to poke the slug out with an implement of some sort. A smooth result is also achieved via the teeth, which have a constant pitch at 8tpi, meaning there are more teeth actually cutting at a constant rate. Additionally manufactured to a high standard from 8% cobalt alloy steel, giving vastly superior performance than normal HSS materials - the slim line design reduces frictional heat build-up and prevents tooth burn out. CK Tools T3202 022 Sheet Steel Hole Saw 22 mm