Rectangular Brass Shutter Lock Padlock 5mm pin tumbler locking mechanism 3 keys Security rate: 7 Size: 70mm Tessi 70Mm Rectangular Brass Shutter Lock Padlock | Tea70 The 70mm rectangular brass padlock is a high security rated padlock with a 5-pin tumbler locking mechanism and a 12mm thick hardened steel shackle. The design ensures that when in the locked position the shackle is largely protected making it more resistant to cutting and prying. Each lock comes with 3 nickel-plated brass keys as standard. Ideal for gates and sheds as well as for use with lengths of chain or hasps.