The BT1517 T-Nut Rail Mounting Fastener set ships with two 10-32 T-Nuts, and two 10-32 x ¾" Button Head Cap Screws.
T-nut sets are commonly used by stock builders to accommodate the installation of sling studs and picatinny rails. These are typically bedded into the stock from the barrel channel side in the following manner (see illustration in second image).
B&T Industries L.L.C. does not make any recommendations or suggestions regarding stock alterations, ALL such modifications should be done by a competent gunsmith, purchase of these parts will be considered an acknowledgment of this.