"These Bosch drill bits are great value for money. They come in clear packaging so you can see what you're getting and are pretty strong compared to similar brands. They're ideal for drilling small pilot holes in thin steel and a wide range of plastics, but I haven't yet used them for anything tougher."
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Review 12 for Bosch HSS-R Drill Bit 3.5 x 70mm Pack of 2
"i know that they where cheap but to drill one hole in 1.2mm sheet steel and then throw it away is not good value, it went blunt so quick it almost didn't manage the one hole! not impressed with this but you get what you pay for with drill bits"