Buckingham Throttle. Used for about two days. Only the main unit and instruction manual, no box. Operation has been confirmed, but since it is a used item, there are scratches and scuffs from use. Please purchase only if you understand this. ------------------- The Buckingham Throttle is one of the most exciting arborist climbing devices in recent years! Arguably the most user-friendly ascender, the Buckingham Throttle can be attached mid-line and allows for quick and easy switching between MRS and SRS functions. Details Rope diameter: 11mm to 13mm Maximum user weight: 310 lbs (approx. 135kg) Weight: 535g (approx. 1.18 lbs) Certification: ANSI Z359.9-2021 Type 4 Easy-to-use locking opening No parts fall out when opened Hollow axis for upper and lower connection points Quick and easy switching between SRS and MRS modes Easy adjustment without tools Mid-line attachment possible Sturdy auxiliary attachment point The Buckingham Throttle is an incredibly smooth tending device in both MRS and SRS modes, allowing you to switch climbing styles with a few button presses. Every part of the Throttle is designed with ease of use in mind. You can adjust the rope friction with a few button presses, and it also features oversized attachment holes that can accommodate your preferred carabiners. No need to worry about dropping parts or accidentally tying a prusik.