From the website:

High-performance Stronghold® 50mm Hardened Steel Padlock

KEY FEATURES:

10mm hardened boron alloy steel shackle

50mm solid hardened steel lock body

Anti-drill protection

Electrophoretic finish - excellent corrosion resistance

Rekeyable 5 pin cylinder

Protective lock body cover

CEN 3

10-year guarantee

The Squire SS50CP5 Stronghold padlock combines compact design with market-leading performance. Featuring a closed shackle, constructed from hardened boron alloy steel, it offers superior strength and durability, while the electrophoretic finish provides outstanding corrosion resistance.