Choose the radius by finished size, handling, and visual style. Smaller radii create a subtle corner for business cards, badges, ID cards, small laminated signs, and compact reference cards. Larger radii create a softer, more noticeable curve for menus, covers, booklets, and display materials. If the job needs a notch, slot, straight cut, or round hole, use the specific die or knife made for that cut rather than a corner-radius die. Material thickness also matters. A sharp blade does not increase the machine’s rated capacity. For lower-volume manual work, compare manual corner rounders against the replacement part cost and the cut styles you need.