December 11, 2020 by Donald C.
“The spring loaded center pin sticks after drilling through your peice. Also you have to use so much pressure to keep it centered that breaks through with so much force it is difficult to control and not damaged it or other parts. If don't have enough pressure the bit grabs and spins across your material and creates damaging scratches. Not happy this at all due to I would mainly use these in sheet metal and I can't trust them not to damage the material.”
