The machine is used for writing and pointing the lifetime test on the touch screen,membrane switch and the switch. It adopts numerical mechanical structure which can move up the matching weights and produce standard constant pressure.According to the writting lifetime test on product’s simulation,the users can analyze the resistance value tested by multimeter through a increasing writing-time. This analysis can get the variation curve,times of life-span,it can use pencil HB instead of measuring head to do hardness test on the shell of products. The testing item includes the test of plastic hardness, surface painting hardness and painting adhesive attraction.This machine which is the nice machine for your testing department has the function with optional double-edged pressure,adjustable speed,adjustable route and settable number of stop bit.