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SF 4-A22 is a cordless drill driver, built for professional craftspeople who take pride in achieving precise results. The same ergonomics-led design unites all levels of the SF tool family, with legible adjustments to express the different engineering within each power class. The tool has been designed to balance the power output required for high productivity with the ergonomics needed for exact, comfortable handling. A well-balanced, contoured body sits firmly in the hand. This improves handling precision, while a stepless trigger means power can be intuitively adjusted to prevent damage to the base material from excessive torque.