Park Tool ATD 1 Adjustable Torque Driver. Your coveted bicycles deserve the very best when it comes to maintenance. The Park Tool ATD 1 Adjustable Torque Driver is a shop quality tool designed to limit the torque applied to fasteners in order to prevent over tightening and damage to lightweight components. The ATD 1 features an all metal internal construction with a comfortable, ergonomic composite molded grip. Each tool is assembled and calibrated at the Park Tool Factory in Minnesota.
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