assembly in additional variations the boundary member can be fixedly attached to the jaw member fig5 c illustrates a working surface of the actuating jaw 140 including a cutting track 174 adjacent to an edge of the actuating jaw 140 the cutting track 174 of the actuating jaw 140 will align with the cutting track of the fixed jaw 120 when in the delivery and or closed position as shown the actuating jaw 140 can also include a fastening track 178 that contains a plurality of cavities 176 in the example shown the cavities 176 form two rows but any number of rows is within the scope of the disclosure the cavities 176 can be shaped to assist in directing of the fasteners upon deployment of the fasteners in tissue as shown the fastening track is adjacent to an opposite edge of the fixed jaw 140 and is shorter in length than the cutting track 174 when measured along the working surface fig6 a to 6c show top side and bottom respective views of a fixed jaw 120 as with the variation shown in fig5 a to 5c the working surface 122 of the fixed jaw includes a plurality of openings that respectively mate with the openings on the working surface of the actuating jaw 140 in the illustrated variation the fastening track 162 comprises two rows of openings 166 that allow for fasteners to deploy through the working surface 122 into tissue captured within the.