METALLIC GUIDE RAILS SMOOTH AND DURABLE: Built-in long-lasting metallic rails from blackened antirust material Easy ejection.Self-locking push button system with a sophisticated spring. Strong locking fotce that does not slide. for a stable andh prolonged use..BUILT-IN WIRE CUTTING SLOT SAFE AND EFFICIENT: Slot design that facilitates string cutting No need to push out the blade or move the string to avoid hand injuries Cutsstring type cords effortlessly..SHARP BLADE FAST EXACT SECURE: Sharp blade ends. Unhindered smooth action while crafting. 18mm wide blade with a blackened antirust treatment. Stable and enduring, not easily bent..CHANGE BLADES SAFELY SNAP IT BOLDLY: The actuator on the end fits perfectly to the blade for a bold split. No need to be concerned with breaking blades or splinters flying off. Change blades neatly.