Two-speed oil pump core, more effortless crimping three pairs of sealing rings improve the plunger, reduce oil leakage Easy pressure release adjustable oil valve, different structure, long service life, no oil leakage phenomenon Humanized handle design is ergonomic, beautiful, comfortable, safe and High hardness thickening design after heat treatment process, debugging hardness is high, , the die comes with steel marks, easy to identify Fitted with a long handle for easy closing., Manufacturer: BMKGODN