Vintage Wilton Heavy Duty No. 406 C-Clamp Drop Forged Steel Made in USA 6 Inch

4400 Series Drop forged C-Clamp - Extra Deep-Throat, Regular-Duty, 0" - 6" Jaw Opening — ACME rolled spindle threads provide maximum strength and clamping force. Clamping Force (lb.) = 5,400 Model Number = 4406 Spindle Diameter (In.) = 3/4 Throat Depth (In.) = 5 Weight = 6.2 lb. Item is vintage and preowned but still works perfectly.