What Hercules has to say:
The HERCULES Auto Lock Speaker Stand SS410B features the Quick-N-EZ Auto Lock System, the EZ Adaptor pole top, the built-in metal leg housing, all-aluminum tubes, and a safety pin for security.
Product Specs:
Height: 1170 mm - 210- mm (46.1" - 82.7") Weight: 3.5 kg (7.7 lbs.) Base Radius: 660 mm (26") Load Capacity: 45 kg (99.2 lbs.) Folded Size: 1235 mm x 150 mm x 125 mm (48.6" x 6" x 5”) Accepts Flanges: 35 mm - 40 mm (1.38" - 1.57")