Last up to 2x longer than a standard HSS M3 hole saw due to 8% cobalt Highly efficient for electricians and plumbers: Long Life For use with hole saws with thread with a cutting depth of 44 mm For cutting holes in a variety of common construction and interior materials, eg wood, drywall, GFK and metals Scope of delivery: Bosch PRO Multi Material Hole Saw, 83 mm, Threaded, Manufacturer: Bosch