ENGLISH CASTERS & WIDE RANGE APPLICATION:Our caster wheels are english wheels,not metric wheels.the threaded stem diameter is 3/8"(9.5mm),threaded stem length is 0.79"(20mm).can be widely used for carts,furniture,dolly,workench,drill press stand,trolley,shelf,wooden cabinet and more, PREMIUM MATERIAL & HEAVY DUTY SUPPORT LOAD:We all use top grade materials to ensure each caster has a long lasting performent.soft and durable polyurethane,2mm thick metal body bracket with anti-rust black electrocated paint,precision premium bearings,strong construction,heavy duty 3" casters can carry a total of 600lbs with a set of 4; SILENT & EASY ROLLING:Most industrial/furniture casters on market are the old version wheels which are weight bulky --inconveniently carry,do not friend to floors--leave markings on floors and make bigger sound--was annoying when rolling.our swivel wheels wrapped with soft durable polyurethane,these rubber wheels are dead silent,smooth,easy to roll,and will not mark up your floors.you can move your heavy devices with ease; LOCK MECHANISM & EASY TO INSTALL:Our metal locking brake casters are double lock,when lock,they lock both the wheel and the rotation,hold your appliances standing at the original place stably.and the installation this set of wheels is easy,predrill hole and settle with nuts,then screw the wheels into the place,no complicated process,maybe one can finish the job by its own; Package includes 4 X caster with brake,1 x wrench,4 X flanger nuts; MALLLALA,set of 4 caster wheels with safety dual brake,threaded stem 3/8" X 0.79"-16TPI coarse thread (US),the stud diameter is 3/8",the stud length is 0.79",no noise rubber wheels,heavy duty capacity load,be widely used for carts,furniture,dolly,workench etc.

Product Description:
Be different from the tradition funiture/industrial wheels,our casters are stylish moden,wrapped with soft & durable Polyurethane--silent rolling;precision ball bearings on both side--easy to roll;bracket made by 2mm thick industrial steel--strong structure,total capacity load up to 600lbs for the whole set of 4;brake pedal mechanism,when applying the brake,keep these in place firmly and stably,be used in multi-occasions,including indoor or outdoor.in addition,the stem caster is light weight,2.5 pounds of the whole set.

Product Specifications
Item: Caster Wheel
Color: Black
Material: Polyurethane,Steel
Model Numbe: 3" Wheel,3/8" X 0.79"-16 Stud
Special Features: Set Of 4 caster with brake
Number Of Items: 4
Mounting Type: Threaeded Stem
Load Capacity: 600 Pounds
Wheel Diameter: 3 Inch
Threaded Stud Diameter: 3/8"
Threaded Stud Length: 0.79"
Measurement System: English
Included Components: 5 X 3/8"-16 Nuts,1 X Wrench

Product Feature
✅Multi-applications;
✅Dual Brake Feature;
✅Heavy Duty Capacity Load;
✅Silent & Smooth Rolling;
✅No Damage To Floors;
✅Easy To Install;
✅Long Lifespan;

Package Details( We Offer 4 Kinds Of Nuts For Your Option )
4 X 3"Casters with brake
4 X 3/8" Threaded Screw Inserts / Flanger Nuts / Nylon Nuts / Hex Nuts
1 X Wrench

Note
The Threaded Stem Is 3/8" * 0.79"-16, Its Measurement System Is English,Not Metric.