HKS 57M M Series made of Metal with Black Finish for 41 Rem Mag S&W 57 & 58; Ruger Holds up to 6rds
https://www.tandktactical.com/shop/088652000579-hks-57m-m-series-made-of-metal-with-black-finish-for-41-rem-mag-s-w-57-58-ruger-holds-up-to-6rds-12118
https://www.tandktactical.com/web/image/product.template/12118/image_1920?unique=acc30ea
HKS 41 Rem Mag, 6rd speedloader for S&W 57,58; Ruger. M series work best with cartridge jiggle.
