Aim Attachments has introduced a line of Hydra-Lock hydraulic quick couplers. The HL quick couplers are designed for use with OEM configured attachments. The couples feature a simple design, in which no pin removal is needed for an easy exchange of a variety of attachments, making an excavator a multi-purpose machine. Allows for one-man operation, allowing the easy exchange of attachments. No special modifications needed for attachments such as buckets, hammers, rakes or rippers. All couplers include a durable lifting hook. Built-in safety check valves help eliminate 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. Multi-position manual safety pin for added safety.