This set includes two pins: a 1/2 inch pin for Class I/II and a 5/8 inch pin for Class III/IV. The locking head rotates 360 degrees and features a push-to-lock mechanism. A snap-on cover provides weather resistance, and a four-pin cylinder enhances security. Price drops from $16.49 to $5.25. Shipping is free for Prime members or on orders over $35.