The ball-end hex key is an L-shaped or T-shaped tool with a spherical tip at the long end, sized to match the width across flats of hex screws. Its key advantage is the ball head, which allows for ang

1. The shape is L-shaped, and it is a special tool for a hexagon socket screw; 2. Hexagonal rod shape, simple and light, is specially used for turning hexagon socket screw. Specification of hexagon sp

An Allen wrench is also called an Allen wrench. Common English names are "Allen key (or Allen write)" and "hex key" (or hex write). It exerts the force on the screw through the torque, which greatly r