Features and Benefits:?7-3/8" Length allows blade to cut holes through double top plates?Fang Tip delivers fast plunge cutting through bottom plates and subfloors?FANG TIP ??Low Blade Profile cuts 2-1/8" diameter holes for 1-1/2" PVC pipe?NAIL GUARD ??Unique design protects against tooth fracture when cutting holes through nail embedded woodThe rough-in SAWZALL? blade has been engineered to solve the unique frustrations encountered when cutting through-holes during rough-in work. It cuts easily controlled small diameter holes in nail embedded wood like no other blade on the market.