TK contains a safety lock feature and is used for cutting tubes of nylon, soft nylon, polyurethane, and other soft plastic tubes of 12mm or less.SeriesApplicable tubing O.D.Applicable tubing materialTK-113mm or lessNylon, Soft nylon, Polyurethane, and other soft plastic tubingTK-218mm or lessNylon, Soft nylon, Polyurethane, and other soft plastic tubingTK-312mm or lessNylon, Soft nylon, Polyurethane, and other soft plastic tubingTK-616mm or lessNylon, Soft nylon, Polyurethane, and other soft plastic tubing