Manufactured from heavy duty and high-impact plastic, strong and durable. Set Includes: Holds up to total 86 pcs 1/4" shank bits The powerful magnetic base is covered with rubberized material to prevent scratch to finished surfaces. Open design allows for quick bit changes when using a power drill or screw gun. Tools and parts are neatly arranged to avoid loss and make efficient use of space. It comes with 1 year quality warranty.