[worlddiamond1]

Hey James, My name is Mike with WDS. There are different styles of blades out there. You have the traditional segmented(slowest but long lasting), the turbo(serrated edge for fast cuts), the Seg-turbo(hybrid turbo segmented on the segmented core(most popular) and then the U-slot(the fastest cutting for hardest material) it depends on what you are looking for. Life or speed? The Husqvarna(Partner) is one of the best handheld along with the Stihl. As for your raduis cuts, there is a blade called the Convex, it is a blade that is a 4.5" or 5" that is cupped shaped. This blade was originally designed for fabricators that cut out the sink holes in counters. It natually follows a curve where a straight blade has a hard time cutting a radius. Call or IM if you have any questions.