Steel ball bearing suspension; full extension on file drawers, 90% extension on box drawers. Front-to-back and side-to-side filing of letter- and legal-size documents with follower block and crossrail included. HON® "One Key" interchangeable core removable lock. Adjustable leveling glides help compensate for uneven floors. Use freestanding with counterweight kit (sold separately) or under 29-1/2" high workstations.