I have quite a few cutters, from cheap brands to more expensive ones, and some of them are yellow. I say yellow because they are almost all the same quality regardless of the company that sells them. I'm sure some factories make them and several companies sell them as their own. Not that it's a bad thing, just saying they're not exactly unique. But. They're good pieces, they cut pretty well. Cut out the profiles as shown in your photos. While these yellow bits don't stay sharp, the more expensive big brands do. But for the price it's a good deal. Just don't expect them to chop down 1000 feet of oak. Good or economical bits, I recommend.