Wera 9640 Mag Rail 6003 Joker Spanner Wrench Set. The 11-piece metric ring spanner set comes on a magnetic rail. Featuring a 7.5 offset open end and double hexagon geometry the Joker 6003 offers four placement points with a 180 turn engaging bolts every 15 for easier use in tight spaces. The slim robust ring side is tilted 15 to the tool axis. Its high-quality surface treatment ensures long-lasting corrosion protection. The “Take it easy” tool finder uses color coding by size and the clips hold the tools securely. The rail attaches firmly to metal surfaces with a strong magnet or can be bolted to the wall.