Stainless SK 5 steel blade, sharp, stable blade, ideal for cutting bevels, round shapes, cable ducts and PVC strips, rubber seals, mold and weather protection strips. High-precision engraved scale: Clear and precise scale surface , so you can cut precisely. Adjustable slider on the scale surface allows cutting angle from 45-135 and can be cut into different shapes if you need. Ergonomically designed handle: The strong and durable integrated handle is made of aluminum alloy and PPC anti-slip -Coating. Comfortable grip, no hand fatigue for long-term use. Security lock with twist lock. The twist lock is easy to close and open, safe and convenient. You dont have to worry about accidentally being scratched by the blade. Replaceable Blade: This trunking scissors set includes extra sharp, durable replacement blade. Note that these scissors are not suitable for cutting metal and stainless steel.