You will get : 10 sets of M8*10mm and 10 sets of M8*20mm, each set includes 10 pieces of screw rods and 10 pieces of hexagon socket head bolt Material: DIY screws are made of quality stainless steel, with the characteristics of hard, rustproof and durable Easy to use: first open a hole 0.5mm larger than the diameter of the shank of the nut, place screws and nuts on either side of the object to be locked , then use a hex wrench (not included) or a suitable tool to lock it finish fixing Application: suitable for most kinds of DIY art, leather craft and clothing making, such as slim photo albums , decorative bags, belts, leather bags, sandals, boots, etc. Depending on the size, it can be applied as a tied fastener Warm Note: The thickness of the locked object should be less than the length of the screw shank and the nut shank, otherwise it cannot be tightened : There is a hexagonal hole on the top of the lock screw, which can be matched well with an inner hexagonal wrench (not included) to prevent slippage during installation. Specification: Size: M8*10mm/M8*20mm Material: Stainless steel Color: As the picture shown Package included: 10 sets of M8*10mm screws 10 sets of pole screw M8*20mm