Lockwood Maximum Security 301 Series Steel Padlock The Lockwood Maximum Security 301 Series Steel Padlock features a high strength steel shackle. Features of the Maximum Security 301 Series Steel Padlock Heavy duty, solid steel case extrusion. Tough high corrosion resistant 11 mmchrome molybdenum steel alloy shackle. Deadlocking double ball locking. Standard as deadlocking function. Custom marking is available. Specification Suitability Designed for maximum security and high corrosion including commercial and industrial situations. Close Downloads Lockwood Padlocks Catalogue.pdf (.pdf, 3.1 MB) Close Part numbers Display Pack 301 Series Hardened Steel Padlock with Chrome Molybdenum Shackle Description Part Number Barcode 63MM, STD 54MM Shackle Opening 301/63/154/DP 93-11847-78249-5 Close Where to buy? Find your local Lockwood stockist. Lockwood Maximum Security 290 Series Steel Case Monoblock PadlockPadlocks Physical Security (SP) grade 10. Lockwood Maximum Security 270 Series Steel Case PadlocksPadlocks Physical Security (SP) grade 9. Lockwood Maximum Security 356 Series PadlocksPadlocks Physical Security (SP) grade 8.