I bought for woodworking, but it was worth a damn. Turn sour sound than I noisy, but more of Monotarou brand is cut very well for cheap price (more than bits for woodworking), so Well use applications is different for reference
Use a substitute for spiral bit, but was using a 4-blade until now buy a two blade this time and want a long blade
Also purchase plan next time because I think and feel there is no problem because the two blades be clean shaved.
It has been used in trimmer woodworking tools. Finish of the plate end face, tenon cutting, grooving, etc., compared to the router bit, cutting cross-section have been satisfied to be able to smoothly finish in sharp. 2 blades, four blades of long blades, and planed cliff finish of the plate end face, in deep tenon cut, two blade of short blade is used properly and shallow tenon, with grooving. 2 flute, I think so as not to change the finish state in the 4-blade.