GearWrench 3881 Medium Ratcheting T Wrench The GearWrench 3881 Medium Ratcheting T Wrench features a 72 tooth fine ratcheting mechanism with a 5° swing arc which decreases hand-over-hand turning. The GearWrench 3881 Medium Ratcheting T Wrench’s flush mounted reversing lever allows the user to change direction without removing the wrench. The GearWrench 3881 Medium Ratcheting T Wrench works with GearWrench’s Pass-Thru™ socket system.