M22W-1333-21/3/45-90-04 (9005) with Lock; 21mm is a circular industrial control switch that is designed to be used as part of a larger electrical system. The switch has a round construction with a rotating opening mechanism that when activated makes contact with a metal piece, completing an electrical circuit. The switch has an M22W design, 1333 contact rating, 21mm diameter, 3-pin connection, a 45° locking rotation, a 90° operating angle, and a 9005 contact material. This switch was manufactured by Roztocze.