Star-tip screwdrivers series (from T5 to T15) with and without tamper-proof holes, 
please add"H" to the end of model number.

Tamper-proof holes are provided for screws such as torx screws with a projection in the screw head. These screws are used in cases where tampering could be a problem. Select the size for working with mobile telephones, communications equipment, radios and precision equipment.