Master Lock Universal Trailer Coupler Locks  
• Improved design fits all tongue type couplers - 1 7/8", 2" and 2 5/16" • Advanced locking mechanism resists picking 
• Two-position lock for easy installation • Fits most unique couplers 
• Model PE273: Commercial version with Python re-keyable cylinder and powder coat finish for greater resistance to corrosion 
• Model PE274: Commercial version with Python re-keyable cylinder and powder coat finish for greater resistance to corrosion, Keyed-Alike