PRECISION SCREW DRIVER SET 1.Made of S2 alloy steel,overall heat-treatment 2.Equipped with 32 types of bits,extensive for use PRECISION SCREW DRIVER SET1.Made of S2 alloy steel,overall heat-treatment2.Equipped with 32 types of bits,extensive for use3.PP +TPR double color handle,comforable grab-feel4.Suitable for repairing computer,mobile phone and clock etc. 32PCS PRECISION SCREW DRIVER SET