The new KwiK Swiss Nitride Bearing has been engineered to provide extra speed, strength, and durability for all types of skating while requiring minimum maintenance. You should be out there enjoying your new bearings, not worrying about them! Utilizing proven Swiss-Made hardened chromium steel alloy balls, the races of the KwiK Swiss Nitride bearings – the surface where friction is created with the alloy balls – are coated with an imperceptibly thin coating of Titanium Nitride to produce the fastest and longest roll available today. And you’ll be able to relax and enjoy that roll right away because KwiK Swiss Nitride bearings come with XL1 Lube already applied for a bearing that is as easy to care for as it is to enjoy. The introduction of the Titanium Nitride-coated KwiK Swiss Nitride Bearings is sure to revolutionize the roller skating world. Aside from the beautiful metallic gold appearance of the Titanium Nitride coating, this remarkable material will not chip, flake, or otherwise degrade during the roughest types of skating – after all, Nitride coating has been used for precision surgical devices and for numerous aerospace applications.