1, the specification of a word screwdriver is 2× 75mm, 2mm wide and 75mm long; There are 3×75, 5×75, 6× 180, 6× 200mm and other models.

2. Cross screwdriver, generally 2×75 mm, has 0~3 models due to different cutter head sizes, and the corresponding metal bar diameters are 3 mm, 5 mm, 6 mm and 8 mm respectively.