UNIQUETEK "Thumb Saver" is a simple solution for preventing sore thumbs and reducing loading time with .22 LR magazines. Simply slide the Thumb Save over the magazine and depress with your thumb. The Thumb Saver compresses the magazine spring with minimal force, reducing thumb fatigue and allowing quick and easy loading.Thumb Saver fits the following .22 magazines:

• Ruger MK I, MK II, MK III

• Ruger 22/45

• Browning Buckmark & Challenger III

• Colt Woodsman & Huntsman

• AMT Lightning

• S & W 22A & 22S

• Beretta U22 NeosThumb Saver is easy to use, compact, designed for right or left handed use and includes a lanyard hole for quick access.