(Based on 
Searching serial numbers
Foldable, perforated desk, simplified adjustment options, tilting base, swivel legs, and more.
The BS310B EZ Clutch music stand is proof that even gear as essential and basic as a music stand benefits from advancing technology. Hercules totally nails it, offering a stand with several handy features.
First off, the music stand has a perforated desk with an upper half that folds down when not in use, utilizing a side locking pin to keep it firmly closed. When you're ready to play, simply press the pin to open the desk back up and lock it in position with the clip on back.
Then there is the EZ Angle Roller, which is equipped with a special frictioning rubber that holds the desk at the perfect angle while also being instantly adjustable. A simple push of the Quik-N-Easy Retainer's lever up or down makes it possible for instant desk mounting and dismounting. The same is true for the EZ Clutch which lets you adjust the height of the upper tube with the same simple lever push action.
The tilting base lets the stand angle from 90 to 75 degrees, to reach positions more suited for your needs. It's swivel legs fit around other equipment, perfect for crowded stages. Simply pull up on the locking ring for compact packing. Last, but not least, the legs have 2 peg holes for adding an optional instrument peg so you can store your instrument when not in use, or a second instrument without taking up any extra floor space.
Based on 
