Easy InstallationStandard GU10 lampholder protective spring clip/ring for fast Twist Lock lamp,no need low voltage transformer,suitable for all standard size GU10 halogen / LED / dimmable / smart bulbs. . Excellent WorkmanshipConstructed from thicken die cast aluminium alloy with Acsergery anti-rust treatment,no spot and no rust.30 degree swiveling angle for no more dark corners. . Minimalist DesignedSmall size and light weight to suitable for any ceiling,extremely low profile designed but improve the style of your home,ideal for general, accent and display lighting of home renovation. . Safe to UseSupplied pre-wired GU10 lampholder with Acsergery heat protective wire,earth wire CPC for safety.Double insulated conductors/cables that meet BS and EN standards.Connectors box for supplementary protection,safer and far more efficient than halogen downlights. . Outer diameter: 90mmHole diameter: 65-80mmMounting Depth: 75mm1 Unit=1x Downlight Fitting + 1x GU10 Lampholder Terminal Block,pack of 10 units. .