This product is a Truck Cap Mounting Clamp, which is made of durable alloy and iron material, with good texture, safe and practical. Easy to install and use, it can be easily applied to your truck, a very practical accessory that will meet your needs well. Features -Color:Silver -Material:Alloy -Size:8.50X7.80X3.00cm/3.34X3.07X1.18in -Note: clip opening size 34mm/1.33in -You can quickly install them within minutes. Just put the camper shell clamps into bed, then put the screw into the hole, finally tighten the screw with a wrench. -Our heavy duty clamps can withstand heavy pressure, they are especially practical if you have a shell with a larger fabric covered bottom mount where it connects to the bed. -The practical nuts to prevent the screw from slipping when tightening. The rough texture on the clamps can increase friction and provide good grip. -Please do not overtighten these mounting clamps to prevent bending. -Made with heavy duty and strong alloy material to ensure quality and strength. For mounting caps, camper shells, toppers to pickup truck. Package list: 2 x mounting clamps