Each and every Armed Shark Balisong is hand-assembled and tested to ensure exceptional flipping performance. All our balisongs come with thread-locked screws. NOTE: This product is a Balisong Trainer, not a real knife. The "blade" shown in the pictures is a dull metal piece designed to mimic the weight and feel of a real blade. Balisong trainers are for recreational and educational purposes only, not weapons. Armed Shark Sahara Butterfly Trainer Knife features: Meticulously crafted with ingenuity Stainless steel blade and aluminum alloy handle Integrated handle structure, CNC machined, non-edged design Corner chamfering treatment, bushing series Hard anodized coloring process Double effective bushing system + copper gasket material Built-in tool stop shaft, high-strength heat treatment to increase rebound Single-side T8 adjustable screw, made of superior steel for strength and durability Product Specifications: Name: Sahara Balisong Trainer Knife Brand: ARMED SHARK Material: Stainless steel blade, aluminum alloy handle Weight: About 93g Dimensions: Full spread approx. 25 cm, blade length approx. 9.8 cm Note: Due to manual measurement, there may be a 0.5 cm error in the values. Please refer to the actual product received.