Profile: Manchester Tool Co. offers tooling systems to the metal cutting, specializes in cutoff, grooving and complementary niche products. Our manchester OTM API ring groovest uses standard inserts and features an integral shank for maximum rigidity. We deliver MTC™ integrated toolholder & insert system integrates the shank, clamp, support blade & stop into one superior toolholder that minimizes hardware complexity and reduces the time it takes to change & clamp inserts.