All of the Abus stainless steel Diskus® padlocks are made in Germany with the latest high tech equipment designed by Abus engineers. The stainless steel shells on every Diskus® is at least 50% thicker than any competitor. To compliment this, the weld around the circumference is at least 50% deeper. This results in pulling and torsion resistance that is 4 times stronger than anything else on the market. The 28 series Buffo has almost the same strength as the 24 series at just a little over half the price. The Diskus® locks fit perfectly on most self storage doors. Once on the door, they are 10 times harder to remove than anything else without the key.