1. Assortment of high precision hex sockets. 2. Made of high quality zinc alloy for durability and rust protection.3. Easy to install, just drill the appropriate size hole and install it with a hex wrench, the tapered outer threads make it hard to fall off due to vibration. Suitable for softwoods of pine, plywood, fiberboard, etc., have a good effect in the combination of furniture. 5. Package content: 7 sizes: M4 x 10, M5 x 10, M6 x 10, M6 x 15, M8 x 15, M8 x 20, M10 x 25, 120 pieces in total. Product Description This assortment of hexagonal sockets contains 7 different types of nuts which are separated and stored in a case. You will quickly find the right size. An insert nut provides a threaded bush for a piece of wood. similar to a wall anchor. These nuts are inserted into a pre-drilled screw hole, in which case the outer protrusions bite into the wood, preventing the nut from turning over. Excellent for furniture. Assembly and carpentry. Material: zinc alloy. Dimensions: M4 x 10, M5 x 10, M6 x 10, M6 x 15, M8 x 15, M8 x 20, M10 x 25. Quantity: 120 items in total. Package includes: 30 M4 x 10 hex screws. 30 M5 x 10 hex screws . 20 M6 x 10 hex screws . 15 M6 x 15 hex screws . 10 M8 x 15 hex screws . 10 M8 x 20 hex screws . 5 M10 x 25 hex screws.