1/4", with ratchet and magnetic holder, 39-piece. With screwdriving and driving tools. Ratchet forged from a single piece (CrV steel), hardened and with 52 teeth and release mechanism (release of inserts by pressing a button). Screwdriver handle with 1/4" square drive and 1/4" receptacle on top of the handle for attaching a ratchet or a T-handle. Steel box with torsion-resistant, indestructible molded insert made of injected polypropylene. Oil and acid resistant, easy to clean, with permanently clearly legible markings for all wrench sizes. Consisting of: Socket wrench inserts from 4 - 14 mm, plus 16 hexagon bits made of high-alloy special steel, 1 adapter each for connecting hexagon / square (magnetic holder / socket wrench insert) and hexagon socket / internal square (ratchet / screwdriver bit). Angled hexagon keys sizes 1.25 - 1.5 - 2 - 2.5 and 3 mm. Other contents see illustration. Drive type / profile Hexagon socket, Torx, Phillips Drive 1/4" Article type Profile size PH1, PH2, PH3, T8, T10, T15, T20, T25, T30 Wrench size 1.5 mm, 2 mm, 4 mm, 5 mm, 6 mm, 6.5 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm Assortment 39-piece Gearing 52 teeth.