Abstract: A twin line-guide adapter easily affixed to the lower narrow front face of popular hand-held stapling guns. The two independent spring-loaded line-guides stabilize flexible, loose, linear entities such as wires, cables, cords or braids. This restraint is accomplished automatically by either line-guide extending or retracting, compensating for the tipping or slipping of the stapling gun, preventing damage to the linear entity from either leg of the driven staple. Each or both line-guides can be quickly thumbed to hold-up detent position or equally fast, shifted down for line-guide function. Both up on detent provides for immediate flat-entity stapling with neither wear on, nor interference by, the adapter.