towards which

is a goal pursued in the use of equipment.

Dasein, in Heidegger talk, is using equipment in order to pursue some goal which he calls "towards which", for the sake of some ultimate let's say life plan, which he calls a "for the sake of". Now, it's important not to speak about goals and life plans. His funny language is necessary because a goal is what you have in your mind or a life plan. Whereas, he just says Dasein is always oriented toward the future, doing something now in order to get to do something later, and that all of this makes sense as oriented toward something which is what that person is up to.

is the work to be produced by things such as the hammer, the plane, and the needle.

“The work to be produced is the “towards which” of such things as the hammer, the plane, and the needle” (Being and Time1, p.70/99)

towards which, n.Definitions

towards which