The Posi Lock P4 Protector is the perfect tool for your next project. The protector provides increased protection against dropping or snagging. It also protects gears and threads from damage, especially when the wrench is dropped onto its handle. This model fits Grainger Item Number 5U719 and Mfr. Model Number 104 wrenches. If you are looking for a way to protect your wrench's gears and threads, the Posi Lock P4 Protector is what you need.. This item has been restricted from sale in the following state (s): []