Q81C 7 Pack Pen Barrel Mill Trimmer Rotation Barrel Trimming Shaft Cutting HeadOOTDTYComs: The surface is coated with anti-rust coating, which is not easy to rust after long-term use, fixed blade, no burrs. Coming from high-speed HSS steel blades, the sharpness and hardness are very trustworthy, and the blade is not easy to break. Four mandrels with 7mm diameter copper pipe outside, which can be sleeve on the mandrel to prevent shattering when washing holes. The cutting head is hard and sharp, which can easily remove glue, copper wire, sawdust and other storage around the copper pipe, making the nozzle flatter. These pen barrel shears are made of solid carbon steel that keeps the edge longer than standard barrel trimmers, provides superior cutting strength for maximum drilling results. Specification: Material: HSS High Speed SteelSize 1: About 1cm/0.39 inchSize 2: About 0.95cm/0.37inSize 3: About 0.8cm/0.31inSize 4: About 0.7cm/0.28inSize 5: About 0.77cm/0.3inchColor: SilverPackage Included: 1x 3/4 inch for cutting1x Hex Wrench1x Copper TubeNote: 1. Please allow 1-2cm errors due to manual measurement, please make sure that you don't mind before placing the order.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.