... cutting tools in China, Annular cutter (core drill) is the very product developed and produced by ... saw, step drill and rail cutter are our main products.Our products are Top quality in China which ... ,OEM available from us. 1. TCT annular drill, 19.05mm universal shank for clamping strength and ... hole cutting and process of annular groove on various magnetic drills and press, like Alfra, Hougen, Jancy, ...