Milwaukee's Hole Dozer Bi-Metal hole saw range is the perfect solution for cutting a variety of materials including Steel up to 1000 N/mm² strength, Stainless Steel and Acid-resistant Steel, Non-Ferrous Metals, Cast Iron, Aluminium, Wood, MDF, Gypsum Plasterboard, Sandwich Materials and PVC. This 5 piece set has been designed with automotive professionals in mind and includes 5 hole saws along with arbor and pilot drill assemblies and a robust storage case. Type Matrix II premium high speed steel is used for the toothed area of these hole saws. Matrix II steel contains 8% cobalt, allowing the teeth to retain the original tooth hardness even at high working temperatures when used in metal cutting applications. The teeth are laser welded onto a high alloy steel body and then vacuum hardened to 65 HRC at a temperature of 600°C to give maximum durability and life time. Due to the high wear resistance of the Matrix II material, these holesaws are ideal for cutting difficult and hard materia