-Made of heavy-duty alloy-steel, in two models fits perfectly a variety hole saws less than 30mm and more than 32mm
-The center drill bit is made of H.H.S material for stable and accurate positioning of the opening position.
-Pins lock the saw to prevent over-tightening and prevent Threads from Stripping
-Hardened material for long thread life
-Fast and easy to engage and disengage hole saw
-Steel construction for added durability
-Works smoothly every time without worry of rusting or corrosion slowing or sticking the operation