The HERCULES Gear Up SS710B speaker stand features the Gear Up Quik-N-EZ system to raise and lower the speakers to the desired height while securing them in place. The SS710BB also features the EZ Adapter pole top. Features: -The Quik-N-EZ Gear Up easily raises and lowers the speaker. The crank system operates on 2 axes simultaneously to lift and lower the speaker quickly and efficiently. -The Quik-N-EZ speaker adapter extends from 35 mm - 40 mm (1.38" - 1.57") to fit speaker bases. Maximum load tolerance up to 50 kg (110.2 lbs.). NOTE: If the speaker adapter is not provided by the speaker, turn the top knob counterclockwise to extend the adapter length. Insertion length 90 mm - 110 mm (3.54" - 4.33").