Seco Tools India [P] Ltd. Is the manufacturer of Square Shoulder Milling Inserts with 9 mm Insert Size. Seco Tools India [P] Ltd is an ISO 9001 and ISO 14001 certified company. The Square Shoulder Milling Inserts with 9 mm Insert Size is used for light duty, and high precision applications. The free cutting, low power conĀsumption design makes the Square Shoulder Milling Inserts with 9 mm Insert Size ideal for smaller machines and setups that lack stability.