WATCH 188: Not your grandfather’s screwdrivers November 29, 2017 by American Watchmakers - Clockmakers Institute This class teaches proper screwdriver maintenance including how to select and use sharpening tools. Learn about torque screwdrivers and new materials for screwdriver blades. This class is not currently scheduled. If you are interested in this class you may request it using the form below. Class Request To request this course, fill out the following form: Name* First Last City/StateEmail* Enter Email Confirm Email Comments This iframe contains the logic required to handle Ajax powered Gravity Forms.