EZ Curl Black Edition Utility BarSuperior Strength & Finish: The Black ceramic coating on the shaft and Hard Chrome on sleeves protects from oxidation and wear. The bar is 8 KG, 1200mm long, it has 28mm shaft diameter, made of alloy steel and snap ring construction, 45K PSI tensile strength rating and a max load of 300lbs, which is more than sufficient for a curl bar. Standard Knurling & Markings: The 1. 2 mm diamond knurl, a standard EZ knurl allows for an easy, comfortable grip.