This useful, high-quality set is made of heat-treated chrome vanadium steel for toughness and durability. You can use these Torx wrenches to open cell phones, PDA cases, PSPs, MP3 players, etc. with its hardened ends for extra high torque during operations. Torx tips are cut square for a secure fit and maximum contact with the Torx socket to prevent slippage and stripping of the socket. Drilled tips allow for tamper-resistant security screws. You can always have the size you need at hand with the high-quality folding handle that holds each wrench firmly. The ergonomic design of the ABS plastic shell of this set also ensures comfort, slip resistance, and safety. Ronix RH-2021 folding Torx key Set is a unique set to repair your electronic devices quickly and safely!