Review on Swivel Wheel Combo Caster with High-Quality Screws - Material Handling Products by Sean Maples

Roller locks just don't do the job very well. In general, the wheels work well, but the locking mechanism leaves a lot to be desired. They were also a bit stingy with lags. They must be at least 1.5. If you want your project to roll and move easily, this is your product. If blocking is important, look for another product.