"13mm size 7\" long pinless universal 1/2\" drive pinless impact extension","Length and pinless joint specifically designed for minimal torque loss from your impact wrench, delivering more power where its needed","Pinless design takes up less space at the shoulder and allows for more angles of freedom compared to other pinned and pinless designs","100% forged CRO-MO extensions and 6-point sockets for maximum durability","Multiple size markings in laser and roll stamping for easy identification 13MM ADV 1/2" DRIVE 7" PINLESS UNIVERSAL IMPACT EXTENSION CUPX13M6 | Matco Tools