The fifi hook is a small question mark shaped piece of equipment used principally in aid climbing to quickly connect a climber to gear to take their weight. It can also be useful for free climbing, alpinism, mixed climbing and ice climbing.
- Kublak, Thomas (2014). Mountaineering Methodology - Part 2 - Gear and Accessories. Tomas Kublak - MMPublishing. pp. 146–147. ISBN 9788087715130. Retrieved 22 September 2017.
- Van Leuven, Chris; Roberston, Ashby. "Tool Users: Fifi Hooks - Alpinist.com". www.alpinist.com. Retrieved 22 September 2017.
- Lowe, Jeff (1996). Ice World: Techniques and Experiences of Modern Ice Climbing. The Mountaineers Books. p. 181. ISBN 9780898864465. Retrieved 22 September 2017.
- Hattingh, Garth (1998). The Climber's Handbook. Stackpole Books. p. 99. ISBN 9780811727068. Retrieved 22 September 2017.
fifi hook skyhook.