Expert Quality, grease gun connector fitted with a sliding sleeve, easily operated by a thumb lever. This simple yet highly effective mechanism allows for one-handed locked on operation. Designed for use with any type of grease gun up to a maximum pressure of 8,000PSI (550BAR) including manual, pneumatic, cordless and industrial. Works with all styles of head profile grease nipples in metric and SAE. Fitted with 1/8″ BSPT female thread.