MOLDED ABS MATERIAL: Gunpla socket organizers are made of premium quality and heavy duty ABS plastic. The material of the metric and SAE socket holder is heavy duty, durable and used in most durable tools to ensure that they do not easily lose their strength over the years PRACTICAL HOLDER SET: Our main purpose of portable and secure socket holder of the socket clip is to efficiently and compactly organize sockets while holding them firmly in place for storage purposes. These socket holders are perfect for keeping tools tidy, well organized and in a safe place SOCKET SIZE ADAPTER: Gunpla socket holders are designed to easily and conveniently accommodate up to a total of 129 pieces of 1/4", 3/8" and 1/2" drive sockets. These holders can hold an impressive amount of sockets, keeping them all in order without any chance of losing them SPRING LOADED BALL RINGS: These socket storage and organizers can firmly hold 1/4", 3/8" and 1/2" metric and SAE sockets, preventing them from falling out or coming out. They have specially designed socket clips that firmly grip the sockets and prevent them from sliding or falling out during storage or transport