I bought a CMT head and bit set but it didn't include all the bits in the CMT catalog so I bought the rest of the bits individually . They cut well, are easy to attach and replace, just a great system for casual, everyday use. I was also impressed by the seller's attitude towards customers. It turned out that CMT did not stock the quantity that their computer system showed the retailer, so the retailer bought them from another, more expensive source to fill this order. Ultimately, I'm sure they