combo pack 10-24 national coarse plug style machine screw tap and number drill bit #25. precision cut threads, accurately formed for consistent, exact threading. heat treated and tempered for tile hard threads, and longer, useful life. designed for hand cutting applications.

• Heat treated and tempered for file hard threads and longer useful life
• Designed for hand cutting applications
• The plug style tap is the most commonly used style of tap with 3 to 5 threads chamfered