Bits are sharp. I bought this set to replace a previous set that had water damage. They work well with wood and plastic. It dulls quickly in metal, so I don't recommend it. Good value product, use it properly on wood and plastic and it will last a long time. Don't leave under a leaky ceiling. However, 13/64 bit is missing directly from the sealed clamshell. The case also doesn't close completely and there are scuffs where the lock slides. Is this a defect or a used item? I bought a new product, not "new". For now, don't bother with Revain to get a replacement. I bought it for $12 and it's still sold out. Disappointed, not desperate. -3 stars for crappy quality control. 5 stars for the product if it is as it should be.