It's great for applications when extremely low height AND extremely high capacity is needed. Hamilton's engineers accomplished this feat with (2) casters:

Mini-Mite: 4 x 3” OAH 6” Carries up to 16,000 lbs.
· Single wheel:
o Forged Steel
· Dual wheel:
o Forged Steel
o Nylast
o Superlast XC
Son of Mini-Mite: 3-1/8” x 3” OAH 4-3/4”, unless indicated Still carries up to 6,000 lbs.
· Single wheel:
o Forged Steel:
§ Rigid also available with OAH 4”
· Dual wheel:
o Forged Steel
§ Rigid also available with OAH 4”
o Nylast (cast nylon)
o Superlast XC (polyurethane