This is for a 5 pack.

These are all keyed the same.

Designed primarily for brake actuators that lock through the body, this lock has a covered keyhole and chrome plating to help prevent corrosion. Steel construction ensures long-lasting dependability. Can be keyed alike to match other etrailer locks.

Features:

• Coupler lock secures the ball coupler of your trailer brake actuator to deter theft
  • Trailer can't be removed from your tow vehicle when locked onto ball
  • Would-be thieves can't secure your unhitched trailer to their tow vehicle with the coupler locked either
• Large span is ideal for trailer brake actuators that fit 2-5/16" balls
• Tamper-resistant design
  • Conical shaped housing ensures tight fit against coupler latch
  • Pick-proof screw-and-lock mechanism provides security
• Rubber end and textured lock core make it easy to grip lock
• Plastic cap covers key slot to help prevent internal corrosion
• Sturdy steel construction
• Chrome finish resists rust and corrosion
• 2 Reversible, automotive-style keys included
• Locks can be keyed-alike to match other etrailer locks
  • Select "Keyed Alike" from drop down menu above and enter number of locks into Quantity box
• Made in the USA

Specs:

• Application: surge brake couplers that lock through the body
• Inside pin length (span): 3-3/8"
• Overall length: 6-7/8"
• Pin diameter: 1/4"