Patent, DIN 3123/ISO 3316.
Return tools for warranty replacement directly to KC Tool. All returns are subject to inspection prior to replacement.
I bought this to accompany my sets of Wera and Felo sockets. This extension fits the sockets as it should, and on the other end it fits my Stahlwille spinner handle and other 1/4" drive tools. The sockets are held firmly to the locking end of the extension, and the button requires enough force to depress that it won't accidently depress to release the socket. The extension is also straight and beautifully finished as you'd expect from Stahlwille. I recommend this product to anybody who needs a long 1/4" extension.