Abstract: The Lower Half Portion of the shaft (32) of the Common Nail is cast, stamped, sliced, sawed, laser cut, etc., centrically-lengthwise into duplicate legs (34). Their chiseled tips (38) are at a distal terminus—as depth adjusted. They are angularly-forced outward and away from each other to ultimately embed the legs (34) finally in-place. An external driving force delivers the energy to embed the chisel tips (38) appropriately. Components of instant include, sequentially, a passive driving head (30), a nail shaft (32), a pair of legs (34), and a pair of chisel tips (38). Appendage-spreading, structural resistance to extraction is the essence of this instant.

Abstract: A lever operated sawblade mounted on a slotted form ensemble for cutting green concrete construction joints to accommodate a specified curb cross-section profile while the access slot avails the sliding sawblade removal of concrete to create a void to accept insertion of pertinent expansion joint material.