Lasts up to 2x longer than a standard HSS M3 Hole Saw Highly efficient for electricians and plumbers: Long Life For use with the Bosch Power Change Plus keyless arbor: offering accuracy and robustness 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 PC Plus Hole Saw Set, 9 pcs, Weight: 1.89377083058 Pounds, Manufacturer: Bosch