With no pin removal needed, the new Hydra-Lock (HL) quick coupler from AIM Attachments is designed to eliminate onsite man-hours and turn excavator attachment exchange into a single- person operation. In terms of operation, the HL coupler minimizes the negative effect on breakout force due to the increase in the tip radius dimension. Built-in safety check-valves are designed to offset any electrical fault and human errors that cause accidents. The cylinder will not disengage when pressure is lost in the hydraulic line. A warning buzzer for the cab is also standard.