CNC Processing: This is a 1/2 inch polished billet aluminum steering wheel spacer with a 3.5 inch outer diameter CNC machined. Universal: These wheel spacers fit most vehicle steering wheels and hubs, such as Grant, Forever Sharp, Superior 6-hole steering wheels and many 6-hole steering wheels measuring 2.75" or 70mm BC OR 1.375" or 35mm from center to each of the 6 holes, and also fits Nardi 6-hole wheels with 74mm BC. Comfortable Driving: The hub spacer works like a washer to elevate the steering wheel hub and provide a comfortable driving experience. Installation Location: It is mounted between the steering wheel and the steering wheel adapter, so please note that it is not a steering wheel adapter. Material High-quality aluminum alloy: Made of aluminum alloy, it is high-quality and durable to use.