This large Roman hub of precision bits machined 40' 5/4" edges with a few simple cuts to reach full size on RedOak, no absolute taring of end grain, no surface burn and ready to go Finish after softening super sharp corners with #0000 wool This bit cuts corners on oak wood so precisely you'd cut your fingers stroking it along a freshly cut ogee It's sharp The carbide on This drill still looked like it was straight out of the box. ProcisionBits is my supplier for these types of bits.