The MT-C is the choice when you need a circular piece, not just a circular mark. Its stepless setting adjusts the cutting diameter from 1 to 50 mm, and the seller describes three different tungsten-steel blades for different paper thicknesses. That is a continuously adjustable cutting system rather than a set of fixed-size punches.
The 95 × 95 × 16 mm aluminum-alloy body is supplied with a non-slip mat and two Allen wrenches. These are useful bench and blade-change details when comparing it with a hand-held punch. Tamiya’s 74122 is the more focused alternative when 2 mm or 3 mm discs in masking tape or plastic plate are the job; its rotating grip and fixed punch bits work differently.
The clear thickness instruction is paper less than 0.4 mm. A shorter feature also mentions plastic and up-to 0.4 mm, without equally clear material-specific limits. Confirm the intended blade and thickness for plastic sheet rather than treating the paper limit as a universal rating. If you only need an engraved circular outline on a model surface, compare the 74150 stencil instead of choosing a disc cutter.