ATE Pro. USA - 6 PC Heavy Duty Steel C-Clamp Set 6pc Set Includes: (2) - 3" C-Clamps, (2) - 4" C-Clamps, (1) - 6" C-Clamps, (1) - 8" C-Clamps Heavy Duty Versatile C clamp for brake rotor, parts assembly, fastening, welding, woodwork, metal work, auto Sliding T-handle. Reinforced distortion free corners. Smooth acme , screw thread, brass plated. Thick Screw, Swivel pad turned from billet steel. Durable Heavy Duty Clamps by ATE Pro. USA ATE Pro. USA - 6 PC Heavy Duty Steel C-Clamp Set