Seco Tools India [P] Ltd. Offers Helical Milling Cutters with 9 mm Insert Size. Seco Tools India [P] Ltd is an ISO 9001 and ISO 14001 accredited company. The Helical Milling Cutters with 9 mm Insert Size is used to deliver high efficiency, low power and low noise performance in a broad range of materials and operations. The Helical Milling Cutters with 9 mm Insert Size can be used for ramping, slotting, pocketing, circular and helical interpolation in addition to traditional square shoulder operations. The cutters are available in a full range of proven grades and geometries.