This is the ANEX mini impact driver, model No. 1903-S. It's a warehouse-stored item, and the packaging is dirty. It appears to be compatible with M5 screws. For larger sizes, the VESSEL model I'm also selling is recommended. This manual impact driver is convenient for removing stripped or stuck screws. It's a compact type, easy to handle, and perfect for maintenance, DIY, and repair work. Product Details: ・ANEX (Kaneko Seisakusho) ・Model No.: 1903-S ・Compatible bit shaft: 6.35mm ・Total length: Approximately 125mm ・Made in Japan Shipped with tracking.