2x longer lifetime the bim progressor hole saw offers 2x longer lifetime than its predecessor'. '.strtoupper('i')t has been redesigned with bosch bi metal with 8% cobalt alloy for increased durability'. '.strtoupper('a')dditionally, it has an enhanced progressive tooth strip that enables faster cuts'. '.strtoupper('u')se this hole saw when drilling holes in wood, drywall, plastics, metal, non ferrous metal and stainless steel'. '.strtoupper('i')t is suitable for use with all corded and cordless drill drivers'. '.strtoupper('f')or use with the bosch power change plus keyless arbor offering accuracy and robustness'. '.strtoupper('f')eatures and benefits bull long life bull bim progressor hole saw offers 2x longer lifetime than predecessor bull redesigned with bi metal with 8% cobalt alloy for increased durability specifications diameter 35mm diameter 2 1 1 2 working length 44mm working length 44mm