Built for long-lasting use, the Makita "Impact Gold" Driver Bit Set delivers up to 10 times the life of standard driver bits. Xtreme torsion technology allows the bits to flex during impact for optimal performance in high torque applications, while precise bit structure eliminates wobble and vibration. These high-quality steel impact driver bits have impact gold coating for maximum rust and corrosion resistance. The 1/4-inch hex shank enables quick, easy bit changes. The set comes in a compact, retractable storage case for easy carrying.