3/4" DV DEEP IMPACT SOCKET SET 17-41 MMHigh Quality Socket set is made of high quality CR MO steel through the treatment of electroplating and thermal and has a long durability and reliability. APPLICATION High quality impact for impact tools. A professional hardening and hardening set for commercial or occasional use 10 Piece Socket Set Impact socket inserts for 17,19,21,22,24,27,30, 32, 36, 41 mm. Sophisticated design: equipped with a circular hexagon socket to reduce wear on the bolt