Bar Box Dynamometer is a compact and easy-to-use mechanical/digital dual-purpose force measuring tool designed for education, quality inspection, and rapid on-site testing. Aluminum alloy integrated shell, can be operated with one hand, convenient to carry. Built in mechanical locking button, one click locking of maximum force value for easy recording of instantaneous data. Dual use for pulling and pressing, with standard S-shaped hooks and flat pressure heads, allowing for quick switching without the need for tools. Used for tape peeling force, bottle cap torque, and film puncture force; Testing of key operation force and connector insertion and extraction force; Fruit hardness, bottle opening force, packaging sealing strength; High school/university physics experiments (Hooke's Law, gravity measurement).