Size:2-3/4' Wide Product Description The 20 Series is the highest evolution of the famous 24 Series DISKUS locks. The cylinder has been improved by adding the ABUS PLUS cylinder which offers the highest protection against manipulation with 250,000 key differs, drilling and pulling protection. The shackle has been improved with a special hardened alloy steel. The lock is virtually pickproof and extremely strong and should be used when you want the ultimate security in a disc lock. From the Manufacturer The 20 Series is the highest evolution of the famous 24 Series DISKUS locks. The cylinder has been improved by adding the ABUS PLUS cylinder which offers the highest protection against manipulation with 250,000 key differs, drilling and pulling protection. The shackle has been improved with a special hardened alloy steel. The lock is virtually pickproof and extremely strong and should be used when you want the ultimate security in a disc lock.