? Each tool acts like a socket to remove hard-to-reach or stubborn oil filters. ? Largest size range available ? all 100% USA-made. ? Specific sizes for popular import OEM and replacement filters. ? Glass reinforced composite material. ?Provides high torque capacity: - Handles 140 ft.-lbs. of torque to remove even the most stubborn filters. - Competitive plastic cup wrenches don?t even come close to this torque capacity. ? Metal Drive Insert will not deform or break even after years of service. ? Use with 3/8" drive or with extensions to reach difficult filters; protects mechanic from hot oil contact. ? Will not crush filter can or cause oil spillage and cleanup expense. ? Extensive application charts included with set. Packaged in a blow molded case.