How do I resharpen Irwin auger bits?
First never sharpen the outside edges of the bit that cut--the spur and sid... read more
How do I change the batteries?
Remove the set screws on the top of the unit using the small hex key. Chang... read more
How do I resharpen Speedbor flat bits?
Use a small file to sharpen the top of the cutting edge and inside the spur... read more