Please note, this item ships from an international seller. Expected delivery is 10-15 days. Description: Socket material: chrome vanadium steel, cutter head material: S2 Because the drill bit is heat-treated, it has good strength and durability. Chrome vanadium steel material has anti-rust performance. The drill has high machining accuracy and is easy to use. The setting content of the plum blossom bit: shaft diameter 6.35 mm (1/4 inch) T8, T10, T15, T20, T25, T27, T30. Shaft diameter 9.5 mm (3/8 inch) T40, T45, T50, T60, T70. Shaft diameter 12.7 mm (1/2 inch) T70. It is ideally placed in a compact plastic box and is easy to carry. Package size: about 20 x 10 x 4 cm, weight: about 600 g Use according to socket wrench. In addition to the maintenance of cars, motorcycles, trucks, electrical equipment, machinery, etc., it is usually used to assemble houses, pass through buildings, shelves, bases, etc. Used to tighten and loosen screws. This is very useful for working in small places. CR-V chrome vanadium steel overall heat treatment advantages: high hardness and large torque Product parameters: Material: CR-V chrome vanadium steel Beatle surface technology: sandblasting Chrome vanadium steel material surface: electroplating T8 T10 T15 T20 T25 T27 T30 Square head size: 1/4 inch (6.35mm) Length: 37mm T40 T645 T50 T55 T60 Square head size: 3/8 inch (10mm) Length: 48mm T70 square head size: 1/2 inch (12.6mm) length: 55mm Production process: overall heat treatment surface plating treatment Packing List: Hexagon socket x13 Storage box x1 13Pcs screw driver bit set include T8 T10 T15 T20 T25 T27 T30 Square head size: 1/4 inch (6.35mm) Length: 37mm; T40 T645 T50 T55 T60 Square head size: 3/8 inches (10mm) Length: 48mm; T70 square head size: 1/2 inch (12.6mm) length: 55mm. Made of S2 alloy steel. Type of head: cross / phillips. Type of shank: 6.35 mm / 1/4 inch Hex. Easy to Use: Strong magnetic Hex shank can suck the screws easily when used it.It is ideally placed in a compact plastic box an