6-Piece 12-24NC Combination Drill Tap Countersink Bit Set SAE, Made of High-Speed Steel with Anti-Rust Blackened Coating, Ideal for Soft Metal, Wood & Plastic, 12-24NC Thread Size, 1/4" Hex Shank

COMBINE DRILL and TAP at the same time - All in one and works great and saves a lot of time and trouble when doing threads for hinges or other projects; No more using a drill to drill the hole and then tapping it out later with another tool HIGH VERSATILITY Set of 6 drill tap bits in SAE sizes, 12-24NC, with 1/4 inch hex quick-change shank, fit Electric hand drill, impact drill, bench drill, electric screwdriver and other tap machines HANDY TOOLS These drill-tap bits are a must-have if you fabricate a lot; you can use them in aluminum, plastic, wood and other thin soft material metal panel; When you use it, make sure it is perfectly straight, take your time, go slow, use lubrication to prevent breaking the bit in the hole EASY TO USE - Each tap drill is engraved with its size convenient for you to choose the suitable size with a glance.

A tapered end on hex shank can prevent excessive knocks; Back taper exceeds the tap to prevent over-drilling and damage to the thread WORRY-FREE This Drill Tap Bits set comes with a portable storage case for convenient use and store