Durable Metal Rubber Clamps: Our shovel holders are equipped with metal supporting brackets and quality rubber buckles; This tool grips with nice load bearing capacity, holds shovel tightly and stably, and keeps truck equipment and tools from rolling around during rough rides Size Specifications: the shovel mounts are for mounting tools in about 0.67-1.57 inches/ 17-40 mm, 2 roof rack clamps total load bearing capacity is about 62 lbs and bottom mounting area is about 2.56 x 1.18 inches/ 6.5 x 3 cm Clamp Mounting Kit: includes 4 truck shovel mounts,8 fixing screws and 8 fixing nuts, you can install this shovel holder clamp in record time; You can mount this shovel holder for truck to a flat surface with drilling, or use the rubber clamps mounted to roof rack, cargo rack, bumper or bed rack Wide Application: install metal rubber shovel holders on roof rack, track bed rack to keep shovel, axes, hammer, rake, hoses, military equipment securely in place; Widely applied on work vehicles, trailers, off road trucks, military equipment, 4 x 4s, ATVs, RVs, boats or on other walls Warm Reminder: please make sure the installation area and supported diameters meet your needs before purchasing; Tools with a diameter smaller than 0.67 inch will result in loose fixation Features: 8 Pcs shovel mount for roof rack Keep tools and equipment firmly in place Specifications: Size: Bottom mounting area: about 2.56 x 1.18 inches/ 6.5 x 3 cm Support diameter: about 0.67-1.57 inches/ 17-40 mm Load bearing capacity: 1 Clamp: about 31 lbs 2 Clamps: about 62 lbs Package includes: 8 x Shovel holders 16 x Fixing screws 16 x Fixing nuts Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.