Sleeve locks couplerin place, helps to secure the connection between straight coupler and this angle coupler and preventing leakage, make the grease filling more efficient and convenient. Isdesigned with 90 degree, can grease hard to reach zerk fittings in tight spaces, convenient to connect some difficult fittings, alonger service life, durable and sturdy, not easy to break. Satisfy your various needs, effectand quick release mechanisms ensure that grease enters the machine without spilling orleaking, and convenient to use for long term in your daily life. The 90 degree crease coupler suitable for auto, farm, truck or industrial using, good for hard-to-reach grease fittings on cars, trucks, farm equipment and more. 90 Degree Grease Coupler Adapter prevent corrosion to the greatest extent and has a longer service life. Specification: Model: 90 Grease Coupler Item Model Number: 1/8NPT Size Chart: Size: 7X4X2cm/2.75X1.57X0.78inch Package Includes: 1 Pair Grease Couplers