Precision screwdriver set includes 39 bits for various applications, including the repair of most Apple® products Powerful magnets inside barrel to better retain bits, as well as pick up and hold fasteners Reversible barrel has standard and extended-reach ends Compact carrying case features a stay-shut latch and extra-long bits for easier access Spin cap offers optimum and precise control Industrial-strength heat-treated bits Cushion-Grip™ handle for maximum comfort Apple® is registered trademarks of Apple Inc; TORX® is a registered trademark of Acument Intellectual Properties, LLC; Tri-Wing® is a registered trademark of Phillips Screw Company