Excellent value for money. They don't last forever like a quality cutter, but they're also part of the price. This is a great way to have the bits you need on hand and when they wear out you'll know which ones to use more often and replace with better ones. For the occasional router user or bits that are rarely used, this is a great buy considering Diablo's 1/4" Cove Bit is $30 - more than this entire set. In terms of usage, I've redesigned my deck and used a couple of cutters from this set and they did their job perfectly and they cut well, but I'm slowly wearing out the one that has been used the most.
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