Liner lock

The modern Linerlock traces its lineage to the late 19th century, but in the 1980s the design was improved by American custom knifemaker Michael Walker.

[7] This was accomplished by removing the weak back spring and adding a heat-treated stop pin to align the blade in the open position.

[9] In an interview with Blade in 1988, Walker stated, “This long leaf-spring effect cuts down on stress on the locking mechanism".

Another variation, known as the inset Linerlock has the leaf spring embedded into the plastic scales of the handle, technically forgoing a metal liner.

Kershaw Knives uses "a pin-and-dimple lock" on a knife designed by custom knifemaker RJ Martin called the "Nerve" to keep the blade closed.

Closeup image of Linerlock mechanism created by Michael Walker , shown from several angles.
Photo of Walker Linerlock knives with closeup of locking mechanism.
Dual liner lock system as used in the Soldatenmesser 08 and various other Victorinox 111 mm models. The engaged leaf springs feature a series of holes to reduce their weight.