Inside pipe cutter kit installation sequence: extension rod (first) – serrated washer – saw blade – flat washer – screw (last). Screws must be tightened and reinforced. Refer to the fourth photo for example. A set of PVC pipe internal cutter with 4 saw blades (3 blades with 1.25-inch diameter and 1 blade with 1.75-inch diameter), and two sets of screw fastening parts. Protect the saw blade. A layer of protective oil is applied to the saw blade. The saw handle is made of heavy-duty carbon steel for hardness, durability, and smooth surface finish. The saw blade is strong, durable, and sharp—ideal for cutting PVC and plastic pipes. It can also be used for soft metal pipes; when doing so, use coolant or water to prevent overheating. Overall length of pipe cutter: 10.5 cm (4.13 inches); hexagonal handle length: 2.8 cm (1.1 inch). Compatible with most electric drills. Easy to install and replace. Compact and portable, suitable for both external and internal pipe cutting. Three safety precautions: 1. Always wear gloves and goggles when using rotary tool accessories and remain aware of your surroundings. 2. Maximum operating speed of the saw blade must not exceed 20,000 rpm. 3. Keep out of reach of children to prevent injury. Material: carbon steel Color: silver Package contents: 1 x internal pipe cutter Note: Color may vary slightly due to lighting and screen differences. Measurement tolerance: ±1–3 cm.