Abstract: A winch winder adapter for a rotary power tool, such as a drill or power screwdriver, to quickly and easily wind-up the strap on the winch bracket. For example, the strap may be wound up by inserting the adapter into the collar of the winch drum and actuating the rotary power tool. The high speed output rotation of the tool rotates the adapter which, when coupled to the collar, quickly rotates the drum and winds-up the strap. This can be helpful especially when there may be numerous cargo strap winches along the length of a cargo vehicle.