Wera 6004 Joker M Self-Setting Spanner is a versatile and efficient tool designed for universal screw driving. This innovative spanner automatically adjusts its size to fit hexagon bolts or screws, ensuring a secure grip with its integrated lever mechanism that clamps firmly to prevent slipping and damage. Featuring a ratchet function, it enables fast screw driving without the need to remove the tool, making work quicker and easier. The spanner's corner-width rectangular prisms allow for a minimal return angle of just 30 degrees, for working in tight and narrow spaces. Its single-arm design combined with the ratchet feature and corner-width prism makes it an essential tool for precision and convenience in various applications. Model Number: 05020103001