From the image, this is a FIXTEC duck mouth stripping pliers (2-in-1), and it has:
• A small adjustment screw near the head → used to control how deep it strips the wire insulation
• Marked cutting size (0.5–6 mm2) → meaning it can handle different wire thicknesses
• Automatic stripping mechanism → adjusts itself slightly when you squeeze, but you fine-tune it with the screw