This squeaky floor repair kit helps repair gaps between subfloors. When the floor is pulled back into the joists, the aluminum blocks add support and the floor not squeak. The aluminum block adopts double-hole design, which can put 2 nails in it. It is sturdy and can effectively squeaks sound. The floor squeak screws kit is easy to install without drilling. Just use the high strength nails and screws to fix in place and screw it into the block with a drill bit. The installation needs only 2 steps. First you need to the floorboard squeaking position and the use the fasteners to secure the floorboards. After these 2 steps and you floor no longer squeak. Our squeaky floor repair kit is suitable for 2 types of floor joists, including standard wood and I-joist. It is suitable for 5/8 inch or any thicker floors. Detailed description: Product Name: Squeaky Floor Repair Kit Size: Aluminum Block: 0.77 x 2.23 x 1.4 inch Long Screw: 2.72 inch Short Screw: 1.17 inch Nail: 1.46 inch Material: Aluminum alloy colour: silver Package Contents: 6 x aluminum blocks 6 x short screws 6 x long screws 12 x nails Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.