I purchased this from Mercari Shops for about 700 yen, but I'm selling it because I've gotten rid of my car and car tarp. I tried attaching one of the four (the one on the far right in the photo) to my car, but the other three are unused. The following is a copy and paste from the previous seller: Tarp Hooks Set of 4 Outdoor Camping BBQ Tent Clips Easy to Install Outdoor 【Specifications】 Type: Tent Clip Color: Black Material: Nylon, Plastic Size: 3 x 2.5 x 8cm Hole Diameter: 1.2cm, Quantity: 4 pieces This is a set of 4 tarp adjusters for car hooks. 【High-Quality Material】Made of high-quality nylon material, it is durable, not easily broken, and can be used for a long time. It is an outdoor camping tarp clip that can secure tarps and tents without cutting. You don't have to worry at all when using the clips. Installation is possible without tools (just tighten the screws by hand). □ There is no interference with the door even after installation, so the door can be opened and closed (including the driver's seat and passenger seat). 【Easy to Install】Tarp clamp's toothed interface and screw lock design that can grip the tarp to the maximum without slipping or damaging it. The simple clip type allows you to fix it in your favorite position and pull the rope. You can fix anything if you clip it on, such as camping, outdoor activities, DIY, sports day, and neighborhood festivals. 【Lightweight】Easy to carry, lightweight, the hole diameter is 1.5 centimeters, which is convenient for passing strings through. It is a convenient outdoor camping tarp clip that can secure tarps and tents. It can be installed on vehicles with rain gutter-type carrier hooks, such as kei cars, Hiace, Caravan, Jimny, and Every 4WD models! 【Ideal for】Perfect for outdoor camping, sailing, picnics, and can be used for sunshades, caravans, tarpaulins, canes, boat covers, etc., making it an ideal accessory. It can withstand a large pulling force and is difficult to loosen after being buckled to the tent, and the damage to the fabric is also small. Attach a carabiner, etc., to the hole of this product and connect it to a hexa tarp, etc.