Features 1、NOISE REDUCTION BEARINGS: Accurate screwdriver bearings do not stud, a rotation duration of up to 1 minute 2、HARD MATERIAL: Accurate screwdriver using Mg Si alloys, hardness, wear resistance is 300% than ordinary material 3、HIGH TEMPERATURE QUENCHING: On the basis of S2 steel, alloy elements such as chromium, molybdenum, tungsten and vanadium are added to the special screwdriver bit head to improve hardenability, toughness and heat resistance 4、MAGNETIC IMPERVIOUSNESS: Magnetic Screwdriver built in strong magnet, magnetic of bit head will no longer fade 5、6PCS IN TOTAL: The package contain a total of 6pcs accurate screwdriver, enough for you to replace and use, very convenient Specification Item Type: Accurate Screwdriver Set Material: S2 steel, Mg Si alloys Specification: Tri Y0.6; Pentalobe 0.8; Cross 1.2; Cross 1.5; Frech recess 2.5; Hex T1 Package List 6 x Accurate Screwdriver