I use this awesome little extension with a Makita Impact Driver for hours under hard torque with no problems. Smooth quick change allows the bit to be inserted without pulling the chuck back, and springs the bits forward when you do pull it back, allowing for one hand operation. Sturdy construction that will last as long as proper care is taken to not drop your drill when equipped. That will bend ANY bit. Also, keep the bore free of metal shavings and junk, and this beast will last years.

Update: Used this bit, along with its 12" brother, and they perform solidly and have remained faithful through rugged use. Every once in a while you do have to clean them out, though, since they contain magnets in the base. Use tweezers or some kind of sticky putty. I personally use the sticky gasket strips that A/C installers use, and it works perfectly.

American Made = Americans Paid
I use this awesome little extension with a Makita Impact Driver for hours under hard torque with no problems. Smooth quick change allows the bit to be inserted without pulling the chuck back, and springs the bits forward when you do pull it back, allowing for one hand operation. Sturdy construction that will last as long as proper care is taken to not drop your drill when equipped. That will bend ANY bit. Also, keep the bore free of metal shavings and junk, and this beast will last years. Update: Used this bit, along with its 12" brother, and they perform solidly and have remained faithful through rugged use. Every once in a while you do have to clean them out, though, since they contain magnets in the base. Use tweezers or some kind of sticky putty. I personally use the sticky gasket strips that A/C installers use, and it works perfectly. American Made = Americans Paid