Petzl Quark 2010 Hand Rest Trigrest One Size U19 TRI. It has two support positions: a brace for hand switching in the high position and a brace for the index in the low position. The latter increases grip strength for leashless climbing and improves planting precision. The Petzl Trigrest For Quark 2010 may also be used in a fixed position without the index support. Specifications for Petzl Quark 2010 Hand Rest Trigrest: Manufacturer: Petzl Size: One Size Package Contents: Petzl Quark 2010 Hand Rest Trigrest Petzl U19 TRI: Quark 2010 Hand Rest Trigrest One Size