Seco Tools India [P] Ltd. Is the manufacturer of Helical Milling Cutters with 12 mm Insert Size. Seco Tools India [P] Ltd is an ISO 9001 and ISO 14001 certified company. The Helical Milling Cutters with 12 mm Insert Size is used for general purpose square shoulder milling applications. The 12 mm highly positive inserts allow the cutter to make short work of a wide range of materials and applications.