Kit contains: micro sandblasting hand-piece, 60 degree nozzle, 9' airline & abrasive reservoir with interchangeable jar The MicroEtcher IIA Intra-oral Sandblaster is recognized as one of the most valuable tools for dentistry. It provides precise surface micro-roughening, improving bond strength up to 400%. Surface area and surface reactivity are dramatically increased for maximum bond. Sandblasting is fast and easy with most surface roughening procedures requiring only a few seconds.