1Made of solid steel material, durable and glossy 2Connect to the backer plate, 8mm shank connect on the drill 3Don't need car polisher, easy use on drill 4Optional Thread: M10, M14, M16 Thread Change To M14, M14 Thread Change To M16 5M14 Thread Change To M16: Female is M14 , Male is M16; M16 Thread Change To M14: Female is M16, Male is M14. Features: 1. Made of solid steel material, durable and glossy. 2. Connect to the backer plate, 8mm shank connect on the drill. 3. Don't need car polisher, easy use on drill. Specifications: Material: Steel Color: Silver Optional Thread: M10, M14, 5/8"-11/M16 Thread Change To M14, M14 Thread Change To 5/8"-11/M16 M10 Length: 4.5cm / 1.77" M14 Length: 4.7cm / 1.85" M16 To M14 Size: 4.2 x 2.5cm / 1.65" x 0.98" M14 To M16 Size: 4.2 x 2.5cm / 1.65" x 0.98" 5/8"-11(M16) Thread Change To M14: Female is 5/8"-11, Male is M14. M14 Thread Change To 5/8"-11(M16): Female is M14 , Male is 5/8"-11. Package Weight: M10(5 pcs): 133g M14(5 pcs): 167g 5/8"-11/M16 Thread Change To M14: 80g M14 Thread Change To 5/8"-11/M16: 92g Package Included: 1/5 x Thread Change Drill Adapter Note: 1. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.