Stainless steel body and boron shackle. 5 Pin anti-prick cylinder including drill protection on cover. Retaining version available (key cannot be removed from lock while unlocked). Anti-Drill Attack Steel Lock Plate 5-Pin Tumbler Locking Mechanism Stainless Steel Body Round Boron Alloy Shackle Suitable for Indoor & Outdoor Use 5 Pin cylinder Anti-Drill Attack Steel Lock Plate 5-Pin Tumbler Locking Mechanism Stainless Steel Body Round Boron Alloy Shackle Suitable for Indoor & Outdoor Use 5 Pin cylinder