The Cranked Door Bolt is the perfect solution for additional home security. Iron Bolt This door bolt is made from malleable wrought iron. It has a black antique finish.   Other Variations There are also other size variations available: 155mm 210mm  These other variations can be found in the related products. Trouble Free Maintenance As with all iron products your door bolt will need regular maintenance in order to maintain its original appearance. A regular oiling to keep the bolt running smoothly will be required. You will also need to give your bolt an occasional clean...