Bestgle 4Pcs 6mm(1/4”) Shank Tungsten Carbide Rotary Cutting Burr Die Grinder Bit for DIY Woodworking, Metal Carving, Polishing, Engraving, Drilling, 150-160mm Length

Used these rotary cutting burrs, along with some drill bits, to remove the lock from an old fireproof filing cabinet. These burrs worked like a champ! At the end of the project the lock had been reduced to a small box of brass shavings, And most of the work was done by these burrs. The roughly 6 inch overall length of these burrs made them just the right tool to "grind out" the lock, after I'd drilled through the tumblers. I'd buy these again in a heartbeat, but it looks like I'll be able to use them for a lonnnnnng time to come. Definitely got my money's worth. And the variety of tip shapes actually helped get the work done, no matter what the angle of the battery drill I was using. Great product for the home handyman!

AWESOME QUALITY

Mine turned into a wet noodle the moment I turned on the porting tool, it went out of control. One exploded, all had to be cut down to about 3 to 4 inches to be able to be used, I really needed to reach the places that these were supposed to go.

I needed some extra long bits to reach inside of a turbo inlet and these definitely work well.

The tools work really well for cleaning up casting flash on iron and steel. Bits stay sharp for a good amount of time and can be reused for multiple projects. Longer shanks work great for hard to reach areas like cylinders and ports. Would purchase again.

Worked for what I needed. Opening up oil galleries on my Ford 302 motor. Just need to be careful to let the bit do the work, any force will bend the shank/bit especially with a digrinder

All of the Shanks are out of balance at low rpm. distortion causing bouncing and inability to correctly perform work. Not suitable for NF head porting

These tools should be included in every RAM Promaster out there as their intake bolts rust and must have the head removed to be able to remove the intake manifold. Terrible design which allows for rain water to sit in the hole used for the bolt. Over time it rusts and there is no longer a head to put a wrench on. These longer shafted burrs made the job a much better experience.