• Fits virtually all 1-7/8”, 2”, and 2-5/16” tongue type trailer couplers to prevent your trailer from being stolen..
• Two barrel-style keys included. This style of locks are harder to pick and much safer than others..
• Anti-drill lock design..
• Limited Lifetime Warranty.
• Unique shackle shape designed to prevent the lock from being pried off your trailer..
• ›See more product details.

Locking your trailer coupler is the best way to keep your trailer safe. A coupler lock protects your trailer by making it nearly impossible for a thief to hook up your trailer to their vehicle. The most secure and universal trailer coupler lock available, the Fastway Fortress will keep your trailer secure, providing you with peace of mind. It’s made from the highest quality corrosion resistant material and fits virtually every coupler style. In fact, after months of testing, we haven't found a coupler it doesn't fit. The most secure and universal trailer coupler lock available, fits virtually all 1-7/8”, 2”, and 2-5/16” tongue type trailer couplers. Made from the highest quality corrosion resistant materials, the unique design uses a hardened steel reversible “U” shaped shackle that allows the lock to fit almost any trailer coupler style, and is easily accessed from the front. Locking and unlocking the Fortress is quick and easy with a front-facing key hole so there isn't anything to reach around to turn the key. The lock cylinder is smooth, making it an easy key turn. The solid engagement of the dual locking pins into both ends of the shackle provides the most security and peace of mind you can get in a coupler lock. The lock has a winged cover, protecting it from dirt, debris, rust, water, and ice. The Fortress coupler lock is perfect for boats, RVs, ATV trailers, travel trailers, enclosed trailers, horse trailers, and virtually every bumper style trailer with a 1-7/8”, 2”, or 2-5/16” coupler. brand_description ----------------- Security Universal Trailer Coupler Lock for 1-7/8\", 2\" and 2-5/16\" Couplers This versatile coupler lock accommodates three different sizes of couplers: 1-7/8\", 2\" and 2-5/16\". Some of its innovative features include a horizontally-bent, chrome-plated shackle protected by a corrosion-resistant, nickel-plated housing. For heightened security, this coupler lock provides an anti-drill pin and a bolt-blocked locking system. Patent-pending multi-step uni-ball fits all 1-7/8\", 2\" and 2-5/16\" couplers Constructed with a super-hardened, chrome-plated 5/8\" shackle Patent-pending horizontal bend in shackle provides secure, forward-facing snug fit on all coupler types Provides larger and stronger corrosion-resistant, die-cast housing for shackle Security features include: Pick-resistant lock cylinder Reversible shackle raises and lowers to lock in several positions Patent-pending dual-action, bolt-blocked locking system One bolt on each side of housing securely locks shackle into position by grooving against shackle teeth 2 keys included The Diversi-Tech coupler lock works on many different styles of trailer couplers as shown below.