BLOX Racing extended wheel studs are manufactured from high-strength alloy steel. These extended wheel studs are designed and intended to be used with BLOX Racing open-ended lug nuts on racing slicks, or when wheel spacers are required.BLOX Racing extended wheel studs are durable, yet lightweight, and the meet safety rule requirements set forth by different sanctioning bodies.SpecificationsThread pitch: 12x1.5mmKnurl-end: 12.25mmLength: 82.5mmNoteSpot-welding is highly recommended after installation