Boxer Tools Silver Aluminum C-Clamp Canopy Clamp for Pickup Trucks - Heavy Duty Construction - Includes 3/8-in x 3-in Screw - Standard Size in the Clamps department at Lowes.com
3" Industrial C-Clamp
Spring Clamp – SnakeClamp Products
Kyien Stainless Steel C Clamp Tiger Clamp Automotive Clamps Wood Working Tools Welding Clamps G Clamp for Home Improvement and Automotive Repair - Amazon.com
WORKPRO 12-Inch Steel Bar Clamps Set, 2-pack Quick-Release Clutch Style Bar Clamps with 2-1/2" Throat, Micro-Adjustment Handle and 600 lbs Load Limit, Steel F Clamp for Woodworking, Metalworking, DIY - Amazon.com
JORGENSEN 36-inch Bar Clamps, 90°Cabinet Master Parallel Jaw Bar Clamp Set, 2-pack - Amazon.com
WORKPRO 12” Bar Clamps for Woodworking, Medium Duty 300lbs One-Handed Clamp/Spreader, Quick-Clamp F Wood Clamps Set for Hand Wood Working Crafts Grip Gluing, 2PC - Walmart.com