As an avid sportsman training and hunting with bird dogs, Dave TerHaar was in and out of his truck cap many times a day, Wondering why he had to fumble with a second set of keys for his cap, the idea of the cap lock being tied to the power truck locks and key fob seemed like the best solution. That didn’t exist, so Dave went to work designing and prototyping the solution.  


DT Design was founded on that initial prototype, a manufacturing partner was found and a patent was applied for. The early years found Dave picking up freight at the freight dock on a car hauler, and packing shipments in a unheated pole barn while figuring out business systems and international sourcing.


Patent for the remote locking truck enclosures


DT Design partners with LEER to provide power locking handles for their premium caps and tonneaus


2nd generation power locking handle patent applied for


The multi directional pull joystick rotary latch and tonneau cover specific 4 bar hinge are patented


A new powered locking handle is developed.


DT Design purchased and remodeled a Warehouse 


DT Design was rebranded to Load n Lock and a 3rd generation power locking handle is patented


DT Design was purchased by an investment group PiOptima


Tonneau Hinge Patented


Jim Hole joins LoadnLock Systems as Director of Product Development

2012 – 2018

Trip to China strengthens and forges new supplier partnerships.

2X growth in domestic OEM business is achieved.

Relationships formed to expand into aftermarket markets.

Distribution is expanded into Australian and New Zeeland markets.

Added additional quality standards, processes and controls are implements.

Many new handle styles are developed for the new markets leveraging core technologies and features

Additional functionality, and security features are added, including removable key cylinders, and a high security smoother inserting key design.

Electronic touch actuated handle developed.


LoadnLock is sold to ILC

Dave TerHaar and Jim Hole are asked to join ILC


ILC merges with Eberhard


Dave TerHaar and Jim Hole sever ties with Eberhard


With millions of their products in the field and the marketplace asking for the next generation of these products. Dave TerHaar and Jim Hole partner on a new venture to fill those needs. Power Core Locks is formed.