The standard black Silhouette Ratchet Blade can be used to cut a splice in any of the CAMEO machines, the Portrait and the Curio.
To adjust the regular Silhouette blade between a depth of 1-10 (10 being the deepest cut for thicker materials), use the gray ratchet that came with the blade or the built in ratchet on the actual Silhouette machine. Just insert the tip of the blade and twist. When inserted into the machine, the fin on the blade's housing should be pointing to 6 o'clock.
The Silhouette Deep Cut Blade is one of the newer Silhouette blades. According to the manufacturer, it should be used with the Silhouette Curio. However, I prefer to use it in the CAMEO (or Portrait). Please note using it against manufacturer recommendations may void your warranty.
The Deep Cut Blade has two rows of numbers to adjust the blade depth from 1-20. The blade can be adjusted using your hand - so no ratchet is necessary. If any part of the blue is exposed on the tip of the blade, that indicates the line is matching up with the blue row of numbers.
The Silhouette Premium Blade is one of the newer Silhouette blades and can be used to cut a splice in any of the CAMEO machines, the Portrait and the Curio. The Premium blade is made of a material that lasts up to 3x longer than a standard Silhouette ratchet blade.
To adjust the blade between a depth of 1-10 (10 being the deepest cut for thicker materials), turn the tip of the blade with your hand.
There is no fin on the Premium Blade so it does not matter how the blade is inserted and locked into the machine.