For sale is a Armstrong Heavy Duty C-Clamp. 12-1/2" Maximum opening. 6-1/2" Throat depth. 19" X 10" Overall size of clamp body. (2) available. Manufactured by Armstrong. These C-Clamps are drop forged construction, Made in the USA. Thread length approximately 11". Approximately 13 pounds net weight each. NOTE: These C-Clamps are missing the end-piece of the threaded clamping rod.