Bi-metal hole saw set Ø 25, 32, 40 & 51 mm, cutting depth 38 mm with a shank and a 6 mm HSS center drill included. With the practical kwb hole saw set, a wide range of materials can be easily processed: unalloyed and alloyed steels, non-ferrous and light metals, steel sheets, aluminum, bronze, copper, plastic, acrylic, drywall, and wood. The 4/6 TPI variable tooth design and the body made of durable HSS-M2 steel with a quick chip removal feature ensure lower heat generation during cutting. This guarantees a long service life for the hole saws.