“This review compares the Kong Duck to the Petzl Mini Traxion, highlighting the Duck's advantage in being significantly smaller and lighter. Its less aggressive teeth cause less rope wear and it can be used on flat slings. The main drawbacks are the increased friction in hauling systems due to the lack of a pulley and a design that can cause rope rub. A user commented that it does not block well on wet ropes and can potentially damage the rope if shock-loaded on a wide carabiner.”

“This video compares the Wild Country Ropeman 1 and the Kong Duck for use as saddle hunting ascenders. It describes them as mechanical ascenders that can replace a prusik knot for easy, one-handed operation on a tether or lineman's belt.”

“A user on this forum expressed concerns about the build quality, describing it as feeling "cheaply made." They also reported that the device's plate bent after use for ascending and tether adjusting, leading to hesitancy in trusting it, especially with webbing. Other users in the thread discuss its intended use as a lanyard adjuster and compare it to other devices, with some defending its proper application while others suggest better alternatives exist.”

“The Kong Duck is praised as an excellent, versatile, lightweight, and compact piece of gear, especially for situations where the exact needs are unknown but the terrain is harsh and gear size is limited. It can be used as an ascender, for progress capture in hauling systems, and as a length adjuster for safety lines. However, it has limitations, such as needing two hands to attach to the rope and lacking a handle, which makes ascending less smooth compared to handled ascenders. It is also not meant for shock loading or hauling heavy loads over 400 lbs.”

“The reviewer notes that the Kong Duck is lightweight and effective for TR solo progress capture due to its toothless cam that grips the rope well and slides easily. However, it is not recommended for hauling because its design causes it to flip with each pull, making it inefficient compared to other devices in its class like the Rollnlock.”

“This blog post compares the Kong Duck to the Wild Country Ropeman, noting that while similar in size and application, the Duck was designed to address the Ropeman's issue of severing rope sheaths under load. The Duck features a design with a large diameter barrel and a tooth pattern on the cam intended to prevent sheath damage. It is certified to EN 567:97 and UIAA 126 standards.”