Accessibility Plus Strength - The 72 tooth ratchet head delivers superior accessbility through its compact head and 5 effective swing arc. 17 teeth are engaged during use, with each tooth only bearing 6% of the drive load - providing strength and durability. Quick and Efficient - Thumbwheel reversing mechanism enables easy change of direction while free-wheeling back plate (palm control) allows application of steady pressure without reversing. SuperKrome Lifetime Warranty Made in the USA