Teng Tools 31 Piece Metric Combination Wrench EVA Foam Set (5.5MM 38MM) TTESP31 13mm Chuck 5mm x 125mm automatic locking mechanism to 5mm x 125mm foam mats supplied in each drawer to protect loose tools and a hard wearing laminated MDF worktop suitable for various tasks All ring heads are equipped with the Teng Tools "Hip Grip" system which means the contact surface grips on the flat surfaces of the nut rather than on the corner In many activities and situations it is extremely important to be able to quickly check that all tools have been replaced in the correct positions in the tool box at the end of the shift or when the work is completed