Tips: What does the M8×25mm mean? It’s the metric unit size, stem diameter is 8mm, threaded stem length is 1″(25mm), make sure the stem size is suitable for your installation before your purchase. Who chose us? For DIY workbench, cart wheels, furniture, office chairs, desks, tables, wood, threaded pipe, metal board, suitable for hardwood floors, marble floors, carpet, indoor and outdoor floors. How to use? For cart boards and wire racks which with holes, you need insert the bolts into the holes, put the washers on and tighten the nuts; For wooden legs of table and furniture, you need to drill holes and insert the bolts in and then tighten it; Or drill holes, screw in the embedded parts, and then tighten the bolts; For pipes with threaded holes or replace your old furniture casters, make sure the bolt size is match it up with the threaded holes before your purchase. ProductSiteLaunchDate : 2020-01-11T05:04:33.933Z Size : 5 Inch Style : Black PU SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation : Multi-Surface UnitCount : 4 UnspscCode : 31162702