JORGENSEN 4-packs Steel Bar Clamps Set 6-inch & 12-inch Medium Duty 600 Lbs Load

And our original multiple-disc-clutch design allows the sliding head to hold securely at any point along the bar. Pony Jorgensen was founded in 1903 in the great city of Chicago. Multiple-Disc-Clutch design consist hardened plated steel clutch disc and one spring which allows the sliding head to hold securely at any point along the bar.