Volk Racing GTC/AV3 Shanked Tuner Lugs. 12×1.50mm 16pcs includes one adapter key. Black. GTC/AV3 lug nuts are Shanked Tuner Internal Drive Lug Nuts. Will not fit standard Conical Seat or Standard Tuner Lug wheels. ~34mm tall – top width 20mm – bottom width ~16mm – Shank length 15mm. Available in both 12×1.25mm and 12×1.5mm.