The Proxxon 1/4 screwdriver set comes in a sturdy, powder-coated steel case. It includes socket wrench inserts ranging from 4 to 14 mm and 16 hex bits made from high-alloy special steel. Additionally, it comes with one adapter each for connecting hex to square (magnetic holder/socket insert) and internal hex to internal square (ratchet/screwdriver bit), as well as 5 angled internal hex keys. A table for threads from M 1.6 to M 24 with tightening torque values is permanently fixed to the lid. The hardness and maximum torque values exceed the requirements of DIN/ISO. The dimensional accuracy is within the approved tolerances. It features torsion-resistant, indestructible molded inserts made from injected polypropylene, which are oil and acid resistant and easy to clean. It has permanently legible markings for all key sizes. The set is also excellent for storage in the drawers of standard workshop carts. It includes a 1/4 reversible ratchet with a release mechanism and a 1/4 screwdriver handle.