The SRP 18A is an ergonomic snap-off knife for all-round use such as cutting plasterboard, insulation, aqua panel and wood. The design with rubberised grip makes it suitable for materials demanding more power. Tapered for better visibility, access and control. The knife is made of durable PC-plastic (polycarbonate) with a steel core for added stability. It comes with 4 blades, 1 in the blade rail and the extra 3 in the dispenser that the knife holds. 1 mm thick metal blade rail for additional stability.