Key benefits Smooth, multi-directional movement: metal ball components allow items to roll easily in any direction, reducing effort and friction in handling and positioning. Durable metal construction: built for repeated use in industrial and light commercial settings, providing reliable performance over time. Easy to install and integrate: approximate 4 mm mounting hole and 40 mm hole-to-hole spacing make alignment and fastening straightforward for common small assemblies. Flexible pack sizes: available in packs of 5, 10, or 20 pieces so you can order the right quantity for repairs, prototypes, or larger installs. What this product does Provides a compact ball transfer solution with an approximate ball diameter of 15 mm for stable, low-resistance rolling. Intended for use where goods or components must be moved, rotated, or repositioned with minimal manual effort. Key specifications (exact values shown as supplied) Material: Metal Quantity options: 5 pcs, 10 pcs, 20 pcs Application: small machinery, trolleys, furniture and racks, etc. Hole diameter: Approx. 4 mm Hole distance (center-to-center): Approx. 40 mm Ball diameter: Approx. 15 mm Practical use scenarios Trolley and cart upgrades: Install multiple units on a trolley bed to allow quick, omnidirectional loading and unloading of packages or parts. Workbench and assembly fixtures: Use on fixtures or positioning tables to rotate and move workpieces easily during assembly or inspection. Furniture and storage racks: Add to heavy drawers, sliding platforms, or movable shelving to improve maneuverability in workshops or retail displays. Compatibility and installation notes Mount using fasteners that fit an approx. 4 mm mounting hole; align units to the approx. 40 mm center-to-center spacing for consistent operation. Suited for retrofits and new builds in small machinery, manual material handling equipment, furniture components, and storage systems. Why choose this product Simple, proven components that make handling and positioning tasks easier without complex modifications. Multiple quantity choices allow economical replacement or bulk installation while maintaining consistent sizing and fit.