Metal construction with a thickened collar provides durable, stable support and a robust mounting point. Three set screws with protective heads are included to prevent scratches during installation. When mounting, use thicker M6 screws with protective heads to avoid marks. The play loop width is increased by 14 mm, resulting in a more stable contact surface. The thickened ring resists deformation, improving long-term performance. The guiding star ring contacts the base to prevent the unit from contacting the base during glide and vibration, yielding a more stable connection. Use scenarios - RC aircraft or drone assemblies:Provides a durable, scratch-free mounting point with improved alignment stability in vibration-prone environments. - Precision test rigs and automation equipment: Enhances stability and reduces wear by maintaining a secure, non-deforming contact surface. - Hobbyist and workshop projects: Suitable for applications requiring a sturdy interface with protective mounting screws and reliable performance over time. Specifications and compatibility - Material: metal construction with a thickened collar for added strength and stability. - Fasteners: three set screws with protective heads; recommended use of thicker M6 screws with protective heads to prevent scratches during mounting. - Contact surfaces: play loop width increased by 14 mm for a larger, more stable contact area; thickened ring resists deformation. - Alignment feature: guiding star ring contacts the base to minimize base contact during operation and improve connection stability.