The PROXXON socket set for inch-sized screws comes in a compact plastic case with a snap closure and a sturdy insert. Socket inserts range from 5/32 to 1 3/8. Special spark plug inserts of 5/8 and 13/16 are included. The set contains screw inserts with square drives for slotted screws, Phillips screws, TX screws (with a front-side hole), and hex screws, as well as 5 hex keys (angled). Additionally, there are 4 extensions, 1 ratchet handle with a square drive, and 2 universal joints. Hardness values and maximum torque exceed DIN/ISO requirements. Dimensional accuracy is within the permitted tolerances. A table for threads from M 1.6 to M 24 with tightening torque values is permanently fixed on the lid. It features a 1/4 and 1/2 asymmetric ratchet with a switch and release mechanism.