Y210C/51/127 - Yale Silver Series Outdoor Satin Steel Closed Shackle Padlock (Boron Shackle) 51mm -Tough new satin chrome plated finish -Closed shackle -Double locking shackle -Ball bearing locking mechanism Body material: Solid Brass/Satin Chrome Shackle material: Boron Steel No. of padlocks: 1 No. of keys: 3 Security grading: 6 Corrosion rating: Outdoor Body width MM: 51 Y140/20 - Yale 140 Series Brass Padlock 20mm Y140/70 - Yale 140 Series Brass Padlock 70mm Y210/38/127 - Yale Silver Series Outdoor Satin Steel Padlock (Boron Shackle) 38mm with Multi-pack