Measure dimensions needed for your Tonneau Cover before buying. Clamp dimensions: A = 1/2" to 3/4" Jaw Opening, B = 1 1/2". 6 high quality structural aluminum clamps for securing inside mount tonneau covers. Shoulder bolt prevents cutting into aluminum. Made in the USA with Structural Aluminum to Ensure Quality and Strength. NOTE: For a Jaw Opening (Dimension A) of 1/4" to 5/8" search B0BZ6MKS78. FOR TRUCK CAPS/CAMPER SHELLS/TOPPERS: USE G-1 CLAMP to Fit CHEVY: Silverado / Sierra 1500, 2500, 3500. Silverado / Sierra '07 with Cargo Rail. DODGE: Dakota. Ram 1500, 2500, 3500. FORD: F150. JEEP: Gladiator. MITSUBISHI: Raider. NISSAN: Titan. TOYOTA: Tundra. View 4 pack ASIN: B01LF2ZYX. NOTE: USE G-30 CLAMP to fit CHEVY: Colorado, S-10, Sonoma. FORD: Ranger. GMC: Canyon. NISSAN: Frontier, Frontier '05 and newer w/Cargo Rail. TOYOTA: Tacoma. View 4 pack ASIN: B071G8NS3B. NOTE: USE G-991 CLAMP to fit F Series Super Duty, view 4 pack ASIN: B01MSTGN4K. NOTE: USE G-120 CLAMP to fit Toyota Tundra '07 and Newer w/Cargo Rail & Tacoma '05 and Newer w/Cargo Rail, Jeep Gladiator w/Cargo Rail, view 4 pack ASIN: B088W56W47. Made in USA