The RIG was designed by Petzl to effectively replace use of descenders like the GRIGRI and STOP. If you have experience with those, you’ll appreciate the RIG’s new and improved features including a more ergonomic, multifunction activation handle with spring return; improved rope braking mechanism; and smoother control componentry as well as the ability to ascend without need to detach from your line. Very similar physically and visually to the I’D, the RIG differs in that it is 25% lighter, more compact, and void of any anti-panic function—which some professional users find annoying (meaning this version is for users with considerable experience). While climbing, if the user releases the handle, it springs into a position such that if anything falls on the handle, the mechanism locks until manually disengaged. For ropes 10.5 to 11.5 mm in diameter. 380 g.