This adapter will install into either a M70 or M72 Yugo fixed stock rear trunnion to adapt to any AR15 stock tube. There is a set screw in the bottom to fit into the groove of the AR15 tube to keep it square with the receiver.
The block is made of 6061 aluminum and then anodized.
The block, screws and tools come in the set. The stock tube and stock does not come with the kit.