CURT 23546 Brass Trailer Tongue Coupler Lock, 1 4 Inch Pin Diameter, Up to 3 4 Inch Coupler Span RACE 2008 2010 Chevrolet Silverado Hub Face Length (Inches):89 2008 2010 Chevrolet Silverado 2500 6 1 2 Foot Bed non binding rods to be a true rolling unit Mounts to all industry standard base rails Offers three height adjustment positions to adapt to each unique truck bed Includes a polyethylene lube plate to eliminate messy grease deposits Tested for safety in accordance with SAE J2638 Protected by a highly durable carbide powder coat finish Limited lifetime warranty (one year finish While CURT safety pins and coupler latches are made to keep your coupler securely latched onto your trailer ball they are no substitute for the locking power provided by a CURT coupler lock