Petzl Shunt $64.95 B03 Use this safety tool in conjunction with your descender as an automatic safety lock-off device on the tails of your rope. May be used to re-ascend ropes. Use with a doubled rope or two ropes of equal diameter.
Strength: Slippage on two ropes: 9mm = 5kN, 10mm = 7kN, 11mm = 7.5kN wt: 190 gm 6.7 oz