Rennie Tools - Pack Of 5 - M4 x 0.7 Combination Drill and Tap Bit, 1/4" Hex Shank. Metric Coarse Titanium Coated HSS Spiral Flute Drilling Tapping Tool. 4mm x 0.7mm Pitch Drill Bit.

• Drill Tap Combination Bit - Pack of 5 - These drill thread taps combine a drilling function and threading function to make it simple to drill and tap a hole with one operation. They drill a hole and cut new threads at the same time. Our tap drill bits provide you with a smooth tapping experience.
• Suitable for drilling / tapping blind holes. These thread tap drill bits can be used for tapping aluminum, sheet metal, stainless steel, die steel, hard plastics, copper, brass, bronze etc.
• This set of 5 combination tap drill bits are designed with spiral flutes so the chip clearance is optimal. They have a split point, so there is no need pre center drill the hole or center punch. The quick change 1/4" inch hex shank can be used on most drills and makes it easy to lock and unlock and gives a secure fixing
• These tap drill bits are made from high speed steel and surface finished by nitriding for high hardness and rust resistance
• Can be used on various drilling machines, lathes, tapping machines, CNC milling machines etc. Using tapping oil will extend the lifespan of your drill tap

Drill tap bits increase efficiency of operation by allowing for drilling and tapping to be accomplished in a single pass. These HSS drill and tap bits are great tools used to create screw threads, to cut or form the thread. They are best used on a machine to do the tapping, such as a lathe but they can be used on a hand drill. Machine tapping with these taps is faster, and generally more accurate because human error is eliminated. These taps are made from high speed steel and surface finished by nitriding for high hardness and rust resistance. Tap screws are designed with spiral flutes so the chip clearing process is better. They are thread taps with drilling function, used to drill a hole and cut new threads at the same time, you will have a smooth tapping experience with them. These tap drill bits are best used on a machine to do the tapping, generally because it is more accurate because human error is eliminated. Material: (titanium coated ) Hex Shank: 6.35mm(1/4") Standard: Tapping drill bit Metric Thread.