The POSI LOCK 10656 Pin is the replacement part you need for your wrench. This pin is compatible with Grainger Item Number 1AC04, 4GB27. It also fits Mfr. Model Number 106, 206. The pin is made of durable metal material that can withstand tough applications and temperatures. When it comes to replacing worn out parts on your wrench, look no further than the POSI LOCK 10656 Pin.