1) "8" safety hook.
The opening and closing mechanism is a spring tongue automatic reset type, and the locking arm is equipped with a self-locking latch consisting of a safety pin, a compression spring and a wrench nail.
To open the hook, lift the nail with your finger to make the safety pin off, press the locking arm downward, that is, to open the locking arm.
If the locking arm is loosened, the locking arm will reset automatically under the action of the elastic force of the return spring, and the self-locking latch will close the hook mouth through the outward elastic force of the opening and closing mechanism at the same time, the compression spring will tighten the safety pin and lock the locking arm.
(2) the "D" shape safety hook consisting of hook, arm lock, opening and closing mechanism for automatic reset spring tongue type, arm lock parts have reverse self-locking and threaded hand lock structure design of two kinds of insurance, self-locking structure equipped with rotary compression spring lock arm, arm lock set to automatic reset and lock, threaded hand arm lock lock structure, rotating arm lock sets can be open and lock safety hook.
