For trailer security, the right lock depends on more than the hitch-ball diameter. DeadBolt's Blockhead designs engage a suitable flat-lip coupler, while Tow & Stow kits and keyed-alike lock sets secure more than one part of the towing connection. Use the model comparison below before selecting a lock.
Three towing-security arrangements
Engages the flat lip of a specified trigger-style trailer coupler, helping deter unauthorized coupling when parked.
Combines separate locking points for trailer storage and towing. Confirm the contents of the exact kit.
Pairs a receiver lock with a lever-style coupler latch lock, simplifying key management.
DeadBolt Blockhead and lock-set comparison
Coupler-ball size, flat-lip width, receiver dimensions and latch-opening size refer to different measurements; do not substitute one for another.
| Model | Lock style | Stated application | Critical fit check |
|---|---|---|---|
| TCL1-YL | Blockhead, yellow | 1⅞- and 2-in lip-engaging trigger couplers | Flat coupler lip, up to 3¾-in width |
| TCL3-AS | Blockhead, arctic silver | 2- and 2⁵⁄₁₆-in lip-engaging trigger couplers | Flat coupler lip, up to 4½-in width |
| TCL3-YL | Blockhead, yellow | 2- and 2⁵⁄₁₆-in lip-engaging trigger couplers | Flat coupler lip, up to 4½-in width |
| TSK3-AS | Tow & Stow lock kit | Selected 2- and 2⁵⁄₁₆-in flat-lip couplers | Kit with multiple lock positions; verify each point |
| RHC32 | Keyed-alike hitch and coupler set | 2-in receiver and lever-style coupler | ½-in coupler-lock opening |
| RHC33 | Keyed-alike hitch and coupler set | 2-in receiver and lever-style coupler | 2-in coupler-lock opening |
Before buying a coupler security lock
For a Blockhead lock, confirm a flat lip beneath the coupler and a compatible trigger-style latch. Check the maximum lip width rather than relying on the ball size. For RHC32 and RHC33, check both the 2-inch receiver fit and the separate latch opening. Do not presume that another key or lock can be substituted.
The TCL3 series is designed for specified lip-engaging couplers; RHC32/RHC33 instead use a receiver lock plus a latch lock. The ½- and 2-inch values on RHC sets describe coupler latch openings, not the hitch ball.
DeadBolt towing locks and security sets
Select a model below to review its product details and current availability.
DeadBolt TCL1-YL
Yellow powder-coated aluminum lock for the smaller flat-lip coupler family.
View product specifications and availability
DeadBolt TCL3-AS
Silver powder-coated model for the wider flat-lip trigger-coupler design.
View product specifications and availability
DeadBolt TCL3-YL
Yellow alternative in the TCL3 wider-coupler group; measure the actual lip.
View product specifications and availability
DeadBolt TSK3-AS
A package designed to secure several towing connections with matching keys, rather than one stand-alone lock.
View product specifications and availability
DeadBolt RHC32
Provides matching-key locks for a 2-inch receiver and a lever-style coupler with a ½-inch lock opening.
View product specifications and availability
DeadBolt RHC33
Similar two-point security concept to RHC32, but with the wider 2-inch coupler latch opening.
View product specifications and availabilityAdditional towing lock guides
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