I use i J&R electric tool and have used it extensively on wood and metal.. It works great with little problems.. I would like a .040 thick cutter at 60 or 75 degrees for finer line metal checkering..as well as replacement carbide cutters for my hand helds. Not as enerjetic as I was but things do wear out! I would contact Brownells and Midway to get the max market exposure. Brownells used to handle J&R but no longer. The rotary tools provide the best in straight line checkering with a lessor chance of 'following' the grain..good luck!!
