A wiper installation (1) which is easy to install and can be fixed on the body without screws. For this purpose, a plate-shaped area (15, 16) having a through bore (17, 18) is provided on both on the wiper installation side and on the vehicle side. A clamp lock (20) is comprised of a tie bolt (21) that can be inserted through the bores (17, 18) and a tension lever (22) which is rotatably disposed on its head portion (26). The clamp lock (20) is made of plastic and manufactured in a multi-component injection molding process as a one-part piece with a tension lever (22) rotatably disposed on the tie bolt (21).