Heavy Duty Coupler (JCBL-4008) Category: Lubrication Tools Description Description Features Designed to Meet the Pressure Requirement of Grease Gun Four Jaw Coupler. Three Jaw Coupler. 45′ & 90′ Coupler. Straight Coupler. Finish: Chrome Plated, Zinc Plated. Related products High Pressure Oil Can – Pistol Type (JCBL-4009) Read more Grease Gun Push Type (JCBL-4003) Read more Caulking Gun – Half Round (JCBL-4013) Read more Grease Gun Pistol Type – Micro (JCBL-4011) Read more