Long Life Gears - Provide 10x Longer Life 38mm Head Depth - For Ultimate accessibility Impact Ready - Strength to stand up to the power of today's impact drivers Rare Earth Magnet - Retains fastener for easy one-handed use Metal Gearcase with Quick Bit Ejection - For durability and convenience on any jobsite Patented Handle Design (Flexible Shaft & Modular Handle) - Reduces vibration for added comfort and control