Seco 24 oz (680 g) Plumb Bob The Seco 24 oz Plumb Bob is engineered for maximum stability and precision in challenging environments. Ideal for high-accuracy work and outdoor use, the added weight minimizes movement from wind and vibration. Key Features • Heavy 24 oz design for superior stability and reduced sway • Precision-machined solid brass construction • Durable hardened steel tip for accurate positioning • Internal storage for spare point