Designed for cutting thick-medium metal. Metalworkers, plumbers, electricians who regularly cut metal pipes with medium-thick walls and other medium-thick steel fittings will appreciate the durability of the Medium-Thick Metal S922BF – a blade made to help them get the job done.. The Medium-Thick Metal 9522BF Reciprocating Saw Blade is made from bimetal: it has a high-speed steel (HSS) tooth strip welded to the high-carbon steel (HCS) body for strength and durability. Use with a cutting fluid when cutting aluminium.. Compatible con todas las sierras sable con vástago de inserción en S.