English System Stem Size: Our caster are standard 3/8" with 16 TPI,Coarse Thread (US), the stud diameter is 3/8" and the stud length is 0.79"(20mm), if your stem socket is Metric M10, this is incompatible, please check before buy.
3 inch Lockable Casters: Hirate caster constructed with brake pedal, it can brake the rotation of the caster only, but the stem is still moveable for direction.
Quiet & Smooth Roller: Made of high-tech elastic polyurethane, with internal bearings are quick rolling and the surface is sleek,wouldn't get stuck by crumbs,hair, wouldn't damage on floors.
Heavy Duty Industrial Caster:Steel structures body is extremely hard wearing and resistant to dirt, 650 lbs capacity for 5 pack 3" swivel casters, can be widely used for most chairs and other furniture with Imperial Stem 3/8” only.
Satisfaction Guarantee: Hirate package comes with set of 5 brake caster and few 3/8”-16 thread Nylon Lock Nuts. Each caster will be backed by Hirate with lifetime warranty of replacement free.