Description: 1/2-28 Inch HSS Machine Plug Tap Tapping Slag Remove Threading Tool Specification: Material: HSS Size: 1/2-28UNF Purpose: For processing nuts or other parts common with the internal thread (ie wire tapping) Feature: Increased heat resistance, extending the life of the tap, tap to make more resistant, and can attack the stainless steel parts. High hardness, high wear resistance, for stainless steel, iron and other drilling. Package Included: 1x Machine tap