Fitment:Fit for C/K, G/P, 6.2L and 6.5L diesel engines to adjust timing on the injection pump Features: (1) Premium grade heavy duty integral steel structure with silver anodized finish, strong and durable, impact resistance, anti-corrosion and anti-rust. High precision and hardness to provide a much longer service life. (2) The J-29872-A is 1/2″ square drive and has two locator pins that engage into the injection pump hub. Turns the injection pump to set pump timing. Needed anytime the pump is removed when valve service is required. Wrench pins fit into holes on moulting flange of pump. (3) Directly replace part numbers J-29872-A or 6083. Each part is manufactured to OEM specifications and testing. Easier to use due to a specialty design to save your time and money. Package included: 1pcs Injection Pump Wrench