Feature: Clamp the glass or tile, then slowly tighten the cutter screw knob to cut successfully. Specification:Item Type: Glass Cutting Tool Material: High-quality steel, high-quality alloy cutter Suitable for Cutting Thickness: 3 ~ 15mm Cutting Range: glass, ceramic tile, vitrified tile (note: tempered glass cannot be cut) Package List:1 x Cutter 1 x Plastic Handle 2 x Spare Cutting Cutter 4 x Screw Rod Rubber Note:The center of gravity of the scribe should be kept vertical and evenly applied.