Rapicut Carbides Limited manufactures Octagonal and Square Inserts. Rapicut Carbides Limited [RCL] is an ISO 9001:2000 certified company. RCL manufactures a wide range of Tungsten Carbide [T.C.] Products viz., tungsten carbide tips, tungsten carbide inserts, wire drawing nibs, bar and tube drawing pellets, tungsten carbide rings, flats, bushes, jute eyelets, solid carbide cutters and a wide range of tool room products. Octagonal and Square Inserts are used in core bits for rotary drilling in exploration work. These inserts are manufactured in various sizes with 10 or 15 degree rake angle. These inserts have special grades which offer faster penetration rate and failure-free service.