Lincoln Electric Welding Clamp Set - 8 Clamps for 16mm Fixture Holes, Secure Round and Square Tubing, Black in the Welding & Cutting Accessories department at Lowes.com
Inserta Clamps, Fit 16 mm Holes – Strong Hand Tools
16mm 22mm 28mm DIN Series Inserta Welding Table Clamps with T Handle - China Adjustable Welding Clamp, Welding Table Clamp | Made-in-China.com
16mm 22mm 28mm DIN Series Inserta Welding Table Clamps with T Handle - China Adjustable Welding Clamp, Welding Table Clamp | Made-in-China.com