Irwin Industrial Tools 4935064 PTS Drive Tools SAE and Metric Plug Taps Contains SAE Plug Tap Module, Metric Plug Tap Module, and Drive Tool System Module Features three separate modules contained in low profile sets with clear lids, perfect for any drawer in the tool box and ideal for carrying to the job Set Boxes bases and lids embed into each other for easy stacking All Taps and Dies are constructed of High Carbon Steel Laser Etched Markings for easy identification