The ABUS Diskus 20 padlocks are the Original Diskus padlocks. They have the 6 disk ABUS Plus disk cylinder mechanism which resists drill, pull & manipulation attacks, a through hardened steel alloy shackle to resist saw attacks and \'Deep Weld Technology\' which offers maximum case strength. These features offer the highest level of protection by restricting the usual method of manipulation. The fitted dust cap helps prevent cylinder damage and there are 30,000 manufactured key differs, each lock supplied with key code card. Key operated, key retaining (a key is needed for locking. Lock retains key until locked). Where to use it: High security requirement in severe weather conditions. The anti-cut plate provides 360 degree protection from sawing while a top quality welded seam secures against impact attack.Overall diameter: 81 mmOverall depth: 35 mm Shackle width: 25 mm I.D.Shackle height: 18 mmShackle Dia: 11 mm