The NEO 1/4', 1/2' socket wrench set is the ideal socket wrench set for mechanical applications. 77 pieces is enough to find plenty of uses for this set. The 2 sizes of ratchets and accessories give us a wide range of applications. The 1/2' size means the possibility of using large forces, with resistant bolts we can fight not only with the ratchet itself, but also with a knob made of an adapter. The 1/4' size means you can use it where nothing else will fit. Each size comes with a 72-tooth precision ratchet (5o pitch), a set of hex sockets, extensions, and joints - the basics. What you should pay special attention to in the contents of this set are: - sockets for spark plugs + joints + extensions + ratchets = possibility of unscrewing spark plugs, even those placed deep in the engine block leaning back; - the 1/4' screwdriver handle looks ordinary but in the handle we have an additional 1/4' socket which allows to use it as an extension with an additional handle for precise guiding. If you add to this a set of bits with an adapter and a range of 1/4' sockets and a T-handle, you can screw practically anything; - an excellent complement are the ring wrenches, which, in addition to loosening and tightening screws, will work perfectly as a support when working with a ratchet to hold a screw or a nut on the other side of the connection; - Socket wrenches - for fast loosening of bolts without removing the wrench from the bolt and also as support when working with a ratchet; - The number of items allows for thousands of combinations and practically only imagination limits the possibilities. All sockets, ratchets and wrenches are made of high-strength chrome vanadium steel (Cr-V). All screwdriver bits are made of S2 tool steel. The whole in a suitably fitted, sturdy case with metal clasps. 25-year warranty confirms the reliability and solidity of the elements. Set contents: 1/2' size sockets: 10,11,12,13,14,15,17,19,22,24,27,30,32 mm, universal joint, candle socket: 21 mm , extensions: 125 mm, 250 mm, ratchet, socket and joint wrenches: 8-9 mm,10-11 mm 12-13 mm 14-15 mm, adapter; size 1/4' sockets: 4,5,6,7,8,9,10,11,12 mm, universal joint, extension: 100 mm, ratchet, T-handle, bit adapter, HEX adapter, Bits: TX - 10,15,20,25,30PD - 0,1,2,3PZ - 1,2,3HEX - 2,3,4,5,6 mm, FD - 3,4,5.5,7 mm, combination wrenches: 7,8,9,10,11,12,13,14,15,17,19 mm, HEX wrenches: 1.5,2,2.5,5,6,8,10 mm