The ADCO Super Thumb Loader ST1PR streamlines the magazine reloading process for 9mm-40S&W double stack magazines, allowing shooters to spend more time enjoying their shooting sessions. Engineered with user-friendliness in mind, this loader reduces hand fatigue and improves efficiency. With the ADCO Super Thumb Loader, a hassle-free reloading experience is just a thumb press away. Easier & Faster Reloading Compatible with 9mm-40S&W Double Stack Magazines Maximize your time at the range by using the ADCO Super Thumb Loader for effortless magazine reloading.