• Made with high-hardness iron material, these tension rods are durable and practical, ideal for bass drums. • Thread size: M6; Rod length: 50mm (1.97 inches). • Full thread with uniform pitch and clear lines, providing uniform and secure clamping force. • Includes a washer to facilitate adjustment and installation on the drum surface, ideal for repairs and renovations. • Measurements taken manually, with a possible error of +/- 0.1 inches.