Smooth shank, large flat heads for wallboard and composition plasterboard, also for attaching lathing material. Size: 1-1/4". 13-gauge. 50 lb. box. No. 114BLPL: Length: 1-1/4", Diameter: 13 ga, Package Size: 50 lb, Shank Type: Smooth, Head Type: Flat, Finish: Blued, Pkg Qty: 20750, Package Type: Box Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!