Wera 416 RA T-Handle Screwdriver – Ratchet Function Rapidaptor Quick-Release Chuck. The integrated ratchet with fine toothing (80 teeth/return angle 4.5) eases and accelerates screwdriving without having to reposition the tool. The ratchet mechanism completely embedded in the handle ensures very handy and comfortable work. With reversing lever for comfortable clockwise/counterclockwise direction change in one-hand operation. The ergonomic shape of the handle fills the ball of the hand well the fingers lie securely in the softly rounded recessed grips.