【Better Base Feet】 Base feet are made from high grade aluminum which add to extra security and durability, better than most in the market made from plastic. High-grade aluminum alloy crossbars can support luggage, ladder or cargo,roof rails can support a weight of 220lbs (100kg). 【Upgraded Structure】This crossbar is capable for the job for life-time. Die-Casting mould aluminum crossbar clamp + Upgraded heavy duty 2.4mm thickness aluminum bar. Black Matte Powder Coated aluminum body offers non-corrosion for entire life time.