4 Hex Screwdriver. Set of 4 Hex Screwdrivers (1.5mm / 2.0mm / 2.5mm / 3.0mm). Widely used in RC Hobby, Bench Work, for Precision Engineering. Disassembling hex screw in most rc cars, rc boat, rc helicopter, rc quadcopter, multi-axis FPV racing and etc.
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