China Military Military Carbon Steel Alloy Aluminum Police Handcuffs

The operation of double-lock metal handcuffs is as follows: - 1. A mechanism that locks the handcuff pawl in the engagement position and prevents the ratchet from further advancing in the closing direction. 2. The ring shackle on the wrist is usually one of a pair connected by a short chain or connecting rod. 3. A spring-loaded pivot bar that engages with the teeth of the ratchet and only allows the ratchet to move forward in the closing direction. 4. A rod with inclined teeth is designed to engage with the pawl. The ratchet shall move freely through the pawl in only one direction of movement. 5. Weight: no more than 425 g (15.0 oz) 6. Material: rust-proof stainless steel. 7. Size: The minimum opening of each pair of handcuffs is 50 mm (2.0 inches) for insertion into the wrist. When the ratchet is engaged at the first notch of the locking mechanism, the inner circumference of the handcuffs shall be at least 200 mm (7.9 inches). When the ratchet is engaged in the last notch of the locking mechanism, the maximum inner circumference of the handcuffs is 165 mm (6.5 in). The maximum total length of handcuffs is 2400 mm (9.4 inches). 8. Mechanical strength: during the test, the maximum tensile force of 2200 N (495 lbf) can be borne for each corresponding part, and the duration shall not be less than 30 seconds. It does not open under load, has no sign of permanent deformation or fracture, and operates in a normal manner after the test. 9. Corrosion resistance: when exposed to salt water spray, there will be no substantial corrosion and continue to work normally.

The initial state of handcuffs and the state after handcuffs are single locks. At this time, the handcuff ring can rotate in one direction to handcuff people's wrists and handcuff people's wrists.