The HKS Model 22J revolver speedloader is part of the M Series loaders which incorporates some cartridge jiggle for smooth operation.

Features and Specifications:
Manufacturer Number: 22J
Capacity: Six Rounds
Caliber: .22LR
Materials: Black Polymer
Metal Knob

Fits:
Smith and Wesson Model 34, 35, 43, 63, and K Frame/Ruger SP101