The Lumatic Safe-Lock Grease Coupler has been made to a highly precise specification. With 4 hardened tool steel jaws that provide a secure connection, once clicked on to the grease nipple it can only be released by pressing the lever down. There is no spurt/mess when uncoupling. Made in Germany. This Lumatic Safe-Lock H.D. Mato Grease Coupler (81mm Long Reach) is precision made with a 1/8in BSPF connection.