Feature: 1. 360 degree rotation shaft designed, smooth and unobstructed, suitable for revolving doors. 2. Thick stainless steel, high hardness, wear resistant, anti‑corrosion. 3. Fine brushed surface, good texture, enhanced corrosion resistance. 4. Countersunk screw holes are designed to be more secure and durable. 5. Hand polished, fine surface, not hurting the hand. Specification: Item Type: Rotating Hinge Material: Stainless Steel Size: Neutral Shaft: Top: Approx. 100 x 24 x 20mm / 3.9 x 0.9 x 0.8in Bottom: Approx. 100 x 24 x 16mm / 3.9 x 0.9 x 0.6in Ball: Approx. 10mm / 0.4in Eccentric Shaft: Top: Approx. 100 x 24 x 20mm / 3.9 x 0.9 x 0.8in Bottom: Approx. 100 x 24 x 16mm / 3.9 x 0.9 x 0.6in Ball: Approx. 10mm / 0.4in. Package List: 2 x Hinge Top2 x Hinge Bottom2 x Rolling Ball Note: Please allow ±2MM error due to manual measurement. Thanks for your understanding.