“1 have purchased about 20+ blades (3/16 10 & 4 tpi,1/4 10 & 6 tpi, 3/4 3/4 tpi (untested). While all the blades were sharp and cut well there are some issues with the welds not being true on the back (yes Online took care of any issue in that case. I have run into issues where the coil stock its self is not true. This is to it reference the back of the blade not side to side flutter. Some of the blades (3/16 and 1/4) I could not even use as the bumps were so severe one is not able to cut (forward) as the blade runs back and forth away from the rear thrust bearing. Bad stock? Delivery was quick and customer service does answer though not in control of stock quality.”