The “SR-79A” fits on virtually every coupler and provides extreme versatility! Use it on your boat trailers, kayak trailers, and more. PAC-BAND keeps dirt, grime, and other elements out of your cylinder. The pin is made with high yield strength stainless steel materials, which are very difficult to machine and is not susceptible to rusting like 302 or 303. PAC-BAND and 2 keys are included Every Lock, One Key: Use one key for all your security solutions. The SR high performance pick/bump resistant 6-pin cylinder allows for more than 2,800 unique key codes. American Manufacturer: Made in USA with global components by a family manufacturer hiring veterans and people with disabilities. Our product line is growing, so if you don’t see your lock, call us! Existing SR Customers Only: Choose Standard Rekeyable only if your key number is #26537–26547 or #93001–95802. All other customers should select UCS, PACLOCK’s higher-performance cylinder technology. PACLOCK’s “SR-79A” features Standard Rekeyable cylinder technology, allowing it to be rekeyed but it is not compatible with UCS products. Compatible with key ranges #26537-26547 & #93001-95802. PACLOCK's SR-79A is a versatile trailer lock that can be utilized on a variety of applications! Also considered to be a universal trailer lock, it can be used on boat trailers, kayak trailers, and more. A variety of interchangeable pins are available depending on your application – the “338” pin is particularly great for 1-Up bike racks!