"Iam a working joiner and use these bits all the time. The screw lead in keeps these bits in line no jumping to one side when you hit a knot. Which is important when drilling out for locks or latches. Bought cheaper and more expensive sets but found these to best ."
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Review 5 for Bosch Flat Wood Drill Bit Wrap 6Pc Set
"I needed a clean 25mm hole to fit a latch mechanism into a door but this product didn't give a clean enough entry. The partial screwthread on the point pulls the blade in quickly but the blade itself tears the wood. Fine if you just want to bore a hole quickly and are not worried about finish."