Comfort, stability, and affordability are the main features of DW's four 5000 Series Thrones. The 5100 standard height and 5101 low base designs have a specially Molded 13" Round Top that is 3" thick. The thrones also feature a Solid Ear Casting with Oversized Locking Nut and full size 1 1/8" Double Braced Base. The 5100, 5101, and 5120 models all feature a Swivel Height Adjustment.