"NorthStar Replacement Blade for trencher/edger item# 191185. Carbide-tipped blade is capable of digging through the harshest conditions. 3/8 in. thick steel blade mounts to 1 in. dia. drive shaft. 1850 RPM suggested blade speed. Frame Material Carbide-tipped, Application Edger/trencher, Blade Size in. 1 1/2, Cutting Depth in. 7, Max. RPM 1,850. Replacement parts are available through Northern Tool Parts Department 1-800-270-0810"
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