From Being and Time:

The work produced refers not only to the “towards-which” of its usability and the “whereof” of which it consists: under simple craft conditions it also has an assignment to the person who is to use it or wear it. The work is cut to his figure; he ‘is’ there along with it as the work emerges. Even when goods are produced by the dozen, this constitutive assignment is by no means lacking; it is merely indefinite, and points to the random, the average. Thus along with the work, we encounter not only entities ready-to-hand but also entities with Dasein’s kind of Being — entities for which, in their concern, the product becomes ready-to-hand; and together with these we encounter the world in which wearers and users live, which is at the same time ours. Any work with which one concerns oneself is ready-to-hand not only in the domestic world of the workshop but also in the public world. Along with the public world, the environing Nature [die Umweltnatur] is discovered and is accessible to everyone.