Feature Highlights: 1. Two Complete Sets – Each set includes a mini prism ball with a magnetic base, perfect for total station monitoring on various surfaces. 2. Strong Magnetic Base – Equipped with a powerful magnet for secure attachment to metal bridges, rails, and any magnet-friendly surfaces. 3. Versatile Mounting Options – The magnetic base also features a through-hole, allowing easy fixation on concrete, wooden walls, and other non-metal structures. 4. Compact & Durable Design – Made of high-quality metal, the 32mm diameter prism ball ensures long-lasting performance and reliable accuracy. 5. Easy to Use – Ready to attach right out of the box—no tools or complicated setup required. Product Details: This mini prism ball is designed for total station monitoring and comes with a magnetic base that offers flexible placement. The strong magnet holds firmly on metal surfaces, while the built-in hole lets you mount it securely on concrete or wood. Crafted from durable metal, it maintains stability and precision in various working conditions. Ideal for construction, surveying, and engineering applications where reliable positioning is essential. Specifications: - Model: JR2200-02 - Prism Diameter: 32mm - Material: Metal - Color: As Shown - Package Includes: 1 × Prism Ball with Magnetic Base Note: Slight color variations may occur due to lighting and screen differences. Allowable measurement error: +/- 1–3 cm.