Ergonomically designed for better comfort and control in use. Smooth slider mechanism features audible click-stop. Made from strong, durable ABS plastic with stainless steel barrel. Self-locking for greater blade security. Detachable end cap slotted for safer blade break-off. High-visibility spare blade holder designed to prevent injury. Includes 1 blade with 13-points. Positive locking action. Uses 18mm standard, heavy-duty and extra thick nonsegmented blades.