Hole saw D. 55mm cut, T. 4mm carbide tipped with drill and spring. This product features flat cut, carbide-tipped cutting edges that allow for repeated regrinding. It includes a replaceable center drill and an ejector spring for the drill core, suitable for material thicknesses up to 4 mm for unalloyed steels and up to 2 mm for stainless steel. It is designed for diameters from 31 mm with specially hardened holder, drill body of 12 mm, and a cutting depth of 4 mm.

Application note: Use high-quality cutting oil when sawing metals; do not use cutting oil when sawing cast iron, and add petroleum when sawing aluminum.

Further technical information: Designed with drill bit and spring.