Got a workbench, cart, or dolly that's hard to move—or won't stay put when you want it to? This set of 4 stem casters is your fix. Each caster has a 2\ black PU rubber wheel that rolls quietly on hard floors (no scratches or noise) and a double locking brake: step on the pedal to lock the wheel from rolling AND swiveling. The threaded stem is 3/8\-16 with a 1\ length, and each caster holds up to 150 lbs (so the set can handle around 450 lbs total). Made from steel and polyurethane, they're sturdy for workshops, garage carts, or even furniture. Installation is straightforward: screw the stem into your pre-drilled hole, secure with the included nut, and you're rolling. Makes moving heavy stuff way easier, and the brake keeps things stable when you're working.