Update: After using this deburring/chamfering tool once, the holes are already being transported along the cutting edge and the handle flexes so much it looks like it's about to break. The aluminum handle doesn't even hold the burr insert as it just falls out. COMPLETELY ILLEGAL nonsense. I'll try to update my review after some use but right out of the box the plastic handle has already started to delaminate which doesn't bode well for it holding up well in a real shop environment with coolant and other chemicals. The aluminum handle deburring tool seems good, but time will tell how it will perform.