1)Material of blade head :45 medium  carbon steel,  AS Plastic

2)Parts:consist of digital LCD display ,printed circuit board, stainless steel button, screws,resistors, battery and other component parts                         

3)Inspection basis:GB8218-2003                               

4)Sampling standard:GB8218-87 S-4             

5)Battery:LR41,with MSDS test

6)tests voltages:6-24V

Automobile test pencil