The hob adopts automatic paper weighting design, self-grinding roller blade and grinding tool body, which makes the hob automatically sharpen and durable. The finished product has no burrs, which is an effect that ordinary cutters cannot achieve. It can cut a variety of photographic papers without sharpening the tool or changing the blade regularly. Film, hot and cold paper, art paper cardboard, office paper, thin plastic soft board, rubber soft board, copper treasure, aluminum, PVC, etc.parameter:Model: 36 inchesCutting: 91CMDiscretion: 1 mmCutting table: 120 * 33cmThe package includes: 1 * 36" hobInstructions: 1. Flatten the paper to be cut under the plexiglass ruler and prepare it on the cutting table according to the required size. 2. The knife box is pulled from one end to the other end, and the work is completed.Blade replacement steps: 1. When the model is 24 inches or larger, move the knife box (3) to the center of the table, and directly flip the knife box to the outside of the table to make the blade in the visible position, but not too strong, so as not to guide The rod is deformed. 2. Use a micro-slotted screwdriver to remove the top screw (1) from the knife box, and then use a wire cutter to gently pull the fixed shaft (8) down to remove the die (5). 3. Insert the special wrench into the hole of the die and the round nut, and rotate it counterclockwise to remove the blade. 4. When loading the knife box, the plane of the blade is close to the lower blade, and the chamfered surface of the blade should be outward.