Senco Brands Inc. added two nailers to its line of metal connector nailers: JoistPro 150MXP and JoistPro 250MXP. They hold two strips of paper-tape collated nails. The nailers are used for fastening metal structural connectors including joist hangers, seismic/hurricane straps and rafter ties. JoistPro 150MXP fires 1 1/2-inch nails with 0.131- to 0.148-inch diameters. JoistPro 250MXP fires 1 1/2-inch to 2 1/2-inch nails with 0.131- to 0.148-inch diameters.