By far the strongest bar we sell, this is the original Texas Power Bar. The 7 shaft is coated with black zinc, is 28mm diameter with a 4 center knurling, 150,000 PSI (minimum) 1500 lb. statstical test bar. This bar can be put into any application without worry and is virtually maintenance free. The sleeves are made of one-piece roll pin construction. Perfect for use in gyms, high school or college weight rooms.