The Buckingham 101SR provides all the components required to self-rescue or if the need arises to rescue a fellow employee. The 101SR descender will automatically stop the user until the user compresses the handle allowing a smooth controlled descent. An additional built in (anti-panic) safety feature stops descent if the user compresses the handle too hard. This unit will allow the rescuer the advantage of lowering a hurt person with ease as well. The 101SR kit comes with retrofit rappelling straps that can be added to an existing harness for self-rescue. Available in different lengths: 101SR- 50 - 50' of 1/2" braided rope 101SR-75 - 75' of 1/2" braided rope 101SR-100 - 100' of 1/2" braided rope Rated to 310 lbs.