Specification: Material: chrome vanadium alloy steel + aluminium Weight: 39G Size: 110MM Batch style: PH00/PH0/PH1/PH2/-1.5/-2.0/-2.5/-3.0 Package Included: 1*8-in-1 Screwdriver Note: 1. Screwdriver in the twist screw only 3 points of force can be, do not twist the screwdriver hard. 2. The screwdriver must take the vertical, that is, 90 degrees and the angle of the screw into a line. 3. The screw twist almost tight on the line, do not habitually, more than a few turns, or directly lead to damage. 4. Screws do not repeatedly rotate, screw specifications are too small, repeatedly rotate the screw will be damaged; screwdriver quality accounted for 30% of the leading role, personal operating techniques and care accounted for 70%, the demolition of the time, we hope that we are careful operation. Screws and screwdrivers are very, very, very small, small force area, can not withstand your force, please take good care of them. Thank you!