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HankC1 · December 14, 2012, 07:12 AM

I use grinding stone to break the case hardened skin at where to drill, doesn't take much and won't affect other area. Works for me.

December 14, 2012, 07:12 AM	#18
HankC1 Senior Member Join Date: April 4, 2005 Location: Ohio Posts: 531	I use grinding stone to break the case hardened skin at where to drill, doesn't take much and won't affect other area. Works for me.