Features 1、Four‑jaw piece, flat mouth closes the oil hole standard, good thread self‑locking 2、Made of high‑quality materials, good quality, durable, wear‑resistant and rust‑resistant 3、Knurled design main body and plane, easy to install and simple to disassemble 4、The nozzle and thread are equipped with protective sleeves for easy storage and maintenance 5、There are four hardened steel jaws, spring ball check valve to prevent leakage Specification Item Type: Grease Gun Coupler Material: Alloy Colour: Black Bottom Thread: 1/8 in Type: Flat Mouth Purpose: Used for Equipment Maintenance, Filling the Bearings of Various Parts of the Equipment with Lubricating Oil Applicable Scenarios: Mechanical Processing, Equipment Maintenance, etc. Package List 1 x Grease Gun Coupler