The Shotgun Magazine Corkscrew safely removes shotgun magazine spring retainers as easy as popping a cork on a bottle. This handy tool easily threads into popular pump and semi-auto shotgun magazine spring retainers and has been designed to put and end to "flying" springs and bent retainers. The Shotgun Magazine Corkscrew is an indispensable tool for your shop or tool kit. Mfg: Brownells