Commonly used backpack material Japanese buckle

The Japanese buckle, also known as the third gear buckle, is a commonly used material on backpacks. The raw materials are generally Nylon or Acetal. It is one of the standard spare parts on backpacks, and usually there is one or two of these buckles on the bag. Usually used to adjust the webbing.
The Japanese style buckle is of sturdy quality and is generally used on the external hanging system of backpacks, such as an axe cover. Alternatively, it can be used in conjunction with non adjustable buckles to compensate for the non adjustable defects of the buckles.
The Japanese style buckle that meets military standards has an extraordinary level of durability. The middle gear is very sturdy and has anti slip grooves. Prevent the webbing from slipping off.
The anti slip and detachment function of the Japanese buckle is even better. With protruding teeth, it can effectively bite into the webbing. Usually used on longer webbing.
A one-way Japanese buckle is a strap on a backpack. Usually used to fix the chest strap in front of the chest strap. The Japanese character buckle is fastened to the vertical webbing of the shoulder strap, and the one-way buckle is connected to the chest horizontal webbing, which can be moved up and down. This design allows the backpack to be carried with the straps close to the chest, without hindering the movement of both arms. But this type of buckle is unidirectional, so if the chest strap is pulled too tightly, it will deform the vertical webbing of the shoulder strap, so large capacity backpacks generally do not use it.
The bidirectional adjustable Japanese buckle is usually used on the shoulder strap to connect the chest strap. The horizontal strap with this buckle is usually a webbing cover that wraps around the strap, rather than just the vertical webbing that wraps around the strap. So no matter how tight it is, there's no problem. Usually used on large capacity bags.