Review on Carbide Cutter Tools for Acrylic and Hardwood Cutting - Uxcell by Michael Powell

These things are awful! I ordered 10 of these replacement parts to complete a project knowing I could get them quickly with Prime. Each only lasted about 3 feet cut. 001 doc at 20 frames per minute at 18,000 rpm. I pulled my latest good version of this (from Carbide Tool Source) and finished all my parts (over 180ft cut) with no problems. This is one of those cases where you don't even get what you pay for. Save money and buy good things.