- Marine-grade aluminum to help prevent rusting - Black powdercoat finish for maximum corrosion resistance - Clam shell has AMPS, NEC and 75mm VESA hole pattern on it - The adjustable lever allows you to tilt the clam shell forward or backward and comes with a secondary bolt if you want to lock the clam shell into a permanent position - Can tilt, swivel, pull-out and rotate equipment 360° to virtually any position for optimal computer placement - Extends 6” bringing equipment close to the user - Designed to hold Gamber-Johnson computer docking stations or cradles in a vertical/tablet position