Features: *There are two attributes to choose from, 1/4'' to 1/4'' and 1/4'' to 3/8''. *Maximum length: approx 19mm. *Maximum width: approx 16mm. *1/4'' Thread length: approx 7mm. *3/8'' Thread length: approx 9.5mm. *Suitable for all kinds gears with 1/4" or 3/8"screw hole. Specification: Product Name: Screw Adapter Material: Aluminium alloy Color: Silver Type: Male to Male Length: (Approx. ) 19mm Max. Width: (Approx. ) 16mm Optional Type: 1/4 to 1/4'', 1/4'' to 3/8'' Suitable for: all kinds gears with 1/4" or 3/8"screw hole. Quantity: 1pc Package Included: 1 × Screw Adapter Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data.Made of high quality material, and practical to use. High quality assurance: Each product undergoes strict quality testing to ensure that you can provide the best quality experience. User-friendly design: The product features and appearance are carefully designed, easy to operate, and suitable for various usage scenarios. Multifunctional practicality: It has a variety of practical functions to meet your diverse needs and improve the quality of life. Environmentally friendly materials: Made of environmentally friendly and safe materials, harmless to the human body, while paying attention to environmental protection. Excellent cost performance: Provide excellent quality at a reasonable price to ensure a shopping experience that is worth the money.