ddrum MB3 Mercury 3 Tier Boom StandThis three tiered boom stand is loaded with usable features. The disappearing boom arm allows the stand to be used as a straight or a boom stand, allowing for the drummer to spread out for maximum comfort, or pull in tightly for smaller stages all the while, allowing for perfect cymbal placement with the micro geared tilter. All tiers, including the boom arm, include memory locks to assure consistent placement night after night, session after session.