Bi-metal Hole Saw Set 11 Pieces 19-68 Mm Hss M42 With 8% Cobalt 38 Mm Drilling Depth 4/6 Tpi Adapters Pilot Bit Plastic Case Proline

quick facts * hole saw set bi-metal 11 pieces 19-68mm hss m42 cobalt adapters pilot bit * category: tools * brand: proline * model number: 27490 * material: hss m42 with 8% cobalt alloy spring steel * number of hole saws: 11 pcs * sizes: 19 22 25 32 35 40 44 51 60 64 68 mm * tooth pitch: 4/6 tpi variable * drilling depth: 38 mm * mount: hexagon or sds-plus adapter * included: 2 adapters pilot bit hex key bushing * package: plastic casespecificationsmodel27490number of hole saws11 pcssizes19 22 25 32 35 40 44 51 60 64 68 mmteethhss m42 with 8% cobaltbodyalloy spring steeltooth pitch4/6 tpi variabledrilling depth38 mmmounthexagon or sds-plus adapterincluded2 adapters pilot bit hex key bushingpackageplastic casewhat is the difference between hss m42 and regular hss?hss m42 contains 8% cobalt which provides significantly higher hardness better heat resistance and longer service life especially in stainless steel and harder materials.why is cobalt important for stainless steel?stainless steel is much harder and generates more heat when drilling. Cobalt increases both hardness and heat resistance making the hole saw more efficient and durable.is this set worth the extra cost compared to m3?yes if you drill in stainless steel or other harder materials. M42 lasts significantly longer and drills faster in tough materials.what speed should i use for stainless steel?use low speed high feed rate and plenty of coolant. Stainless steel requires patience and proper technique.can i use the same adapters as for other hole saws?yes the set includes standard adapters that fit most drills with hexagon or sds-plus chuck.