Designed for use with 9mm Luger ammunition used in the Ruger SP101. These full moon clips are made from .032 thickness stainless steel and function as a speed loader as well as to assure positive ejection. The Moon Clips have an optimized charge hole design for positive ejection over a wide range of 9mm Luger ammunition. The easy to load full moon clips act as a speed loader for quick reloads. The design allows for loading and unloading without the use of a moon clip tool. Sold in a three pack. Made in the USA.