Crescent CNDS7V 7 Pc. Universal Quick Convert T-Handle Dual Material Nutdriver Set Quickly convert from straight to T-handle, simply pull shaft, rotate handle, and push shaft back in to lock Hollow shaft works over long threaded rod where normal nut drivers will not fit Universal design fits 6 fastener types (hex, square, 12Pt, e-torx, partially rounded hex and spline)