Wain-Roy style coupler systems provide the benefits of fast and efficient changing of excavator buckets and attachments while maintaining close to the manufacturers pin-on performance specifications. This results in a near zero loss of breakout force. The Wain-Roy coupler systems have been the leaders and innovators in the couple market for many years and are often copied by other manufacturers, but other systems lack the many Wain-Roy features. Manual and hydraulic locking systems are available.