Objects of metal or other material inlaid into the handles of a knife or it could be the handled material inlaid into an interframe knife.
The hilt and blade are machined or forged from the same piece of metal; the term "full integral" means that the blade, hilt, tang and pommel are all from the same piece of steel.
(Interrupted Lockbar Pivot System.) ILPS allows the blade, when closed, to occupy space normally used by the lock bar pivot pin. ILPS uses two separated pins, one on each side of the lock bar; consequently, the blade can be significantly wider than would otherwise be possible in the same width handle.
Ron Lake, another folding knife maker who achieved world prominence about 1972; invented the Interframe® method of inlaying handle material in solid metal handle frames.