Thread Size: M12 x 1.5mm<br />Aluminum Alloy<br />Length:9cm<br />Diameter:2cm<br /><br />Packing: 20 / boxes (this product is a regular hexagonal nut， using ordinary wrench on it. So he didn't deserve special spanner.) <br />To avoid damaging your product， please use a 19MM 6-sided socket (Do NOT use a 12-sided socket).<br />To avoid damaging your product you MUST use a torque wrench.<br />Under NO circumstances should this be installed with an impact driver.<br /><br />M12 X 1.5 Applicable range: <br />for Toyota cars， for mitsubishi cars，for Honda， for buick cars，for modern cars， for Chevrolet cars， for ford cars， for wuling brand， for kia cars， for byd cars， for chery cars<br /><br />Package Include:<br />20 x Aluminum Wheel Lug Nuts<br /><br />Note:Professional Installation Highly Recommended，No instructions included.