Lenox Bi-Metal Straight Back Shatter Resistant Reciprocating Saw Blade is used in construction and demolition for cutting; through a push and pull motion 6 TPI Bi-metal Blades Stanley 20558B956R | Lenox Bi-Metal 20558 Reciprocating Saw Blades LENOX® TOOLS Reciprocating Saw Blade, Bi-Metal, 9 in Length, 3/4 in Width, 0.05 in Thickness, 6, Applicable Materials: Clean Wood or Nail Embedded Wood Power blast Technology™ increases blade life, high speed blasting along the cutting edge strengthens the blade to reduce breaks and increase durability LONGER BLADE LIFE & INCREASED VERSATILITY - Patented T2 Technology reduces cutting force on each tooth and optimizes chip removal to allow efficient cutting in the widest range of materials. Saw Blades - Bi-Metal Reciprocating - Lenox For processing wood with metal , Blade length: 229 mm