Reese Towpower Dual-Fit Fas-Lok Trailer Coupler Dual-fit spacers ensure a proper fit, fewer returns. Dual-Fit Fas-Lok couplers come with spacers that fit two channel widths helping to ensure a proper fit. Cam-action adjustable lock nut for proper ball tension. Trigger handle makes it easy to secure the coupler on the hitch ball. Rust-resistant zinc plating. Tethered pin included for added safety. Class II, Hitch Ball Size 2 , Gross Trailer Weight 3500 lb, Channel Width 2-1/2 3 Square Channel, Lock Type Adjustable Lock Nut, Finish Zinc, Pkg Qty 1, Package Type Sleeve WARNING This product can expose you to chemicals including Chromium which is known to the State of California to cause cancer birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.