100pcs/set Sturdy Chrome Vanadium Steel Screwdriver Head Set Professional Torx Hex Bit Set with Case

Features:
An essential tool for home or industrial using.
Sand blasting in surface, which is rustproof and good looking.
Come in with a good quality handy red case which holds bits in place.
Most of the bits are marked on the side with their size, which is very convenient.
It includes 100 types of bits and sockets in one set, which would meet your different needs.
Chrome-vanadium steel screwdriver bits with heat treatment, which are in high hardness and good toughness.