The steel conversion kit includes a 6 chamber conversion cylinder with 6 safety stop notches and a full length .22 barrel liner with brass fittings that will not damage the bore of the barrel. Converts .36 caliber black powder revolver to shoot 22LR round. Use only cowboy ammunition that does not exceed 850 FPS; never use hot or jacketed ammunition. 6 Safety Stop notches located between chambers. This feature allows the hammer to be lowered between loaded chambers.