Grip-Rite, 3.5 LB, 4-1/2" Roll, 16 Gauge, Black, Tie Wire, With Square Hole, Can Be Used To Secure Rebar To Rod Chairs, Rebar Chairs & Other Intersecting Pieces Of Rebar, Strong Enough To Bundle Rods, Pipe & Lumber, Square Hole Roll Design Fits Standard Tie Wire Dispensing Reels For Added Convenience.