Holds Glass From Inside or Outside Surfaces While UV or Silicone Adhesive Cures Adjustable CRL Adjustable Angle Suction Holder holds glass panes from the inside or outside surfaces. Glass panes can be fixed at desired angle and adhered by UV-glue or silicone adhesive easily. Height and position can be adjusted 11/16 inches (18 millimeters) by knobs at each arm. The 4-3/4 inch (120 millimeter) rubber suction pad with lip holds the glass panes firmly until the adhesive cures and they stick to each other. Adjustable between 40 and 300 degrees.