Sidchrome 14Pc 440 Pro Series Ring & Open End Spanner Set Metric SCMT22297Sidchrome 14Pc 440 Pro Series Ring & Open End Spanner Set Metric If youre working on the tools day in and day out, youll want to protect yourself from hand and wrist strain. You need a high performance spanner thats designed to work with you, not against you, like the 440 Pro Series. The patented ANTISLIP design and TORQUEPLUS fastening system make tightening a breeze and limit potential damage to fasteners. The unique, ergonomic design ensures