The Wain-Roy XLS coupler system allows the benefit 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 XLS coupler system design specifically reduces the free play between the coupler and attachments. The design provides the close fit between coupler and attachments to be maintained through simple adjustments with hand tools and periodic shimming. The XLS coupler system is designed for use with the Wain-Roy Original and XLS style buckets and attachments. The XLS coupler system is available in an easy-to-use manual or "operate from the seat" hydraulic release configuration.