CHAINLOCK connectors have been specifically designed for joining together Xtra quality mining chainand have compatible strength. This is 25% greater than connectors designed for use with DIN qualitygrade 2 chain of either round or flat link configuration. This Xtra performance has been achievedthrough careful choice of materials and heat treatment whilst keeping the dimensional properties withinthose specified in DIN 22258:2003 Part 2. This will ensure that the connectors - which must be installedin the horizontal plane of the chain only will safely negotiate sprockets that have been designed inaccordance with this specification.CHAINLOCK connectors can also be used with DIN quality grade 2 chains having the advantage of higherstrength thus giving an additional safety factor.