3 Piece Set Toolmaker's “Yankee” Rapid Adjust Quick Spring Nut Dividers, Inside ID & Outside OD Calipers, 0-6.5” / 165 mm Range, Brass Fulcrum and Fine Adjustment Mechanism, Flat Leg, C7-6, C8-6, C9-6

Spring dividers and calipers (ID and OD) are used for measuring and transferring precise measurements. They are used by multiple professionals. These dividers/calipers are made from high-grade carbon steel with hardened and finely polished points. They feature a solid nut for precise fine adjustments that will securely hold any measurement. Adjustment mechanism is central located to assure smooth action. "Yankee" style flat-leg construction makes units very durable. They have a substantially hardened spring for years of service. Maximum opening is 6.5 inches or 165 mm.