This is a fully plastic spring knife made with a 3D printer. No metal parts are used, and the blade is also made of plastic, making it a safe model. Recommended for display, interior decoration, photography props, etc. The blade actually springs out with a spring mechanism and functions. Notes: ・This product is made as a toy, model, and display item, and is not a real knife. ・Excessive force may cause damage. ・Keep out of reach of children. ・Please refrain from using it for dangerous purposes or in public places.