Hook Knife - A paragliding accessory. A knife with a special, protected blade that allows the pilot to cut the wing loose (risers) in an emergency.

• 伞刀（割绳器）飞行伞装备附件之一。一把在紧急情况下用来割断伞绳(主提带)的刀子，有特殊保护装置刀身(不会割伤人)。