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MTJNR/L
MTJNR/L Series = Double Clamp Type
Sumitomo SEC External Toolholder
As a pioneer of indexable insert tools, and after being the first in Japan to sell indexable insert holders in 1959, and cam-lock type over the following years, Sumitomo has accumulated constantly, developing many improvements over a long history of 50 years, and delivered many various "SEC tools". Currently we offer a variety of different configurations according to various applications.