The socket inserts are made from alloyed cv steel they are extremely solid and true to size the drive is not via the edges but the sides resulting in better power and therefore preventing damage to the nut the fine tooth ratchet included 72 teeth ensures precise application the ratchet possesses a quick lock button and right left switch all inserts and extensions are matt chrome plated the inserts have knurled edges enabling quicker extraction of the loosened screws contents 15 sock