catspa, The detachable lanyard works on a tip up carry folder that has a lanyard hole on the same end as the clip (like a Sebenza). The lanyard hole must be carefully drilled or reamed to accommodate the push pin. The pins I am currently using are 3/16" diameter X 1/2" (to the bearings) long. Other sizes are available. The insertion end has a few ball bearings which protrude from the cylinder of the pin to keep it in place. That is why the hole diameter is important. The ball bearings won't grab the end of an oversize hole. The other end of the pin has plunger and a D-ring. The plunger releases the balls so the pin can slide in or out of the hole. The D-ring is used to fasten a lanyard to the pin. The other end of the lanyard can be attached to your belt. Shoelaces or parachute cords make good lanyards. You can insert or remove the pin with one hand. It is easier to insert the pin if the knife is in your other hand. Pin removal can be done with one hand even if the knife is out of sight. The pin dangles on your lanyard while the knife is in use, or wrap the lanyard around your wrist and leave the pin in the knife. The push pins are sold at sail boat places or Reid Supply Co.