Storage and transportation in one neat package! The RR6WD, rolling base unit has it all. A Beefy 3 1/2inch Caster Board with integral locking breaks, so you can move your gear from gig to gig with ease. A Rugged pull out drawer to provide all the extra storage space you’ll need for cables and accessories. And the ability to raise your Slant Rack or Amp system by 17