The Climbing Pick is a mobility tool that lets you launch yourself upward by right-clicking the side of a supported wall surface.
Right-click the side of a climbable block while standing close to it. The pick will launch you straight upward and reset your fall distance so the jump is safe to use for vertical movement.
The boost depends on the surface you click. Some surfaces are treated as stronger climbing surfaces than others, and each level of Efficiency on the Climbing Pick increases the launch strength even more.
The Climbing Pick can require dual wielding, meaning you may need to hold one in each hand for it to work. It also has a very short cooldown to prevent players from spamming it.