3 inch Side Locking Stem Caster Wheels,3/8" -16 x 1-1/2" Threaded Swivel Casters
4 x Stem Casters. - Swivel Lock: Combination lock with brake. 【Stable construction】: Housing made of heavy duty steel for high load, the max capacity set of 4 wheels is up to 600lbs. - Brake Type: Top Locking Brake.