Description YIZBAP5x4.75 to 5x4.5 Wheel Adapters Specifications Quantity: Four (4) Thickness: 1.25" (31.75mm) Vehicle Bolt Pattern: 5x4.75 (5x120.7mm) Wheel Bolt Pattern: 5x4.5 (5x114.3mm) Hub Bore: 74.1mm Thread Pitch: 12x1.5 Material: T6 Aerospace Grade Aluminum with 12.9 grade studs PACKAGE INCLUDES 4 x wheel spacers (1.25" per unit) 20 x open end 12x1.5 lug nuts 2 x user manual. Fitment 1982-2011 S10 (will not fit front hub of 2WD Models) 1983-1994 S10 Blazer (will not fit front hub of 2WD Models) 1983-2002 Camaro 1997-2019 Corvette 1979-1985 Eldorado 2004-2009 XLR 1982-2002 Firebird 1974 GTO 1982-2004 GMC Sonoma Never remove factory installed studs on wheel spacer/adapter. Never use impact wrench for wheel spacer/adapter installation. Note: Please make sure that these are the correct application for your vehicle. We do not guarantee any fitment onto any vehicle,we only guarantee that you will receive the item described above. This spacer adapter includes open-end lug nuts to secure the spacers onto your factory hubs If your factory thread size is different from 12x1.5 - Need to purchase a set of open-end lug nuts in the correct thread pitch (your factory thread pitch) to complete the installation Your Factory wheel studs may extend past the surface of the wheel spacers. In this case, you will need to: 1) Shorten the factory studs 2) The wheels need to have open slots (cavities) between mounting holes. 3) Purchase a set of shorter studs and replace them with the factory studs