Review on Enhanced Performance with Spyder 600044 Rapid Eject 4 25 Inch - Unleash Speed and Precision! by Deron Gilliam

Not bad. Continuous. Rough cut because it only has about 6 teeth instead of 30 or 300 so it grabs and tries to pry the drill bit out of your hands (worse than many of the big drill bits I've used). Spin this bit at high speed and hold it away from the material for a smoother cut. Because you have to run it at a higher RPM to smooth it out and compensate for the small number of teeth, it will grab hard when it seizes and stop suddenly and abruptly mid-cut. Hold it firmly instead of pressing on the material and be careful with your hands when using a strong drill. Good price for a durable and dangerous saw. PS did not use a quick bar pull as the bar supplied did not have a 3/8 shank and was too small for this saw. (The Dewalt 3/8 quick change arbor worked great with this saw.)