Combines hard teeth and flexible body through Bi-Metal welding. 2. Curved tooth section for better contact. 3. 3x3 tooth geometry for efficient cutting Fits all S-shank reciprocating saws Highly efficient for metalworkers and other trades: Long Life Offering both long life and a neat cut, the PRO Thick Metal precise S1137HBF is an advanced Bi-Metal design, with a HSS strip forming the curved teeth. For Cutting Metal Pipes And Profiles Bosch 25x PRO Thick Metal S1137HBF Precise Reciprocating Saw Blade (for Metal Pipes And Profiles, Non-Ferrous Metals, Length 225 Mm, Professional Accessory Reciprocating Saw Reciprocating Power Saw DIABLO 9 in. 8 TPI Steel Demon AMPED Carbide Reciprocating Saw Blade... For precise cutting metal pipes and profiles, eg mild steel pipes and interior fittings, copper pipes Lasts up to 5x longer than a Bosch S922AF Blade - Metalworkers, renovators, and electricians regularly need to cut metal pipes and other steel fittings with the recip saw. Bosch 5x Reciprocating Saw Blade S 922 BF 'Flexible for Metal' (Metal Scope of delivery: Bosch PRO Thick Metal precise S1137HBF Blade, 1., 1 x 25 x 225 mm, 25 pcs