Speed Meets Strength with Southwire’s Open-Top Box Roller. Get cables in and out faster than ever with Southwire’s lightweight open-top box roller—designed to save time where it counts. Its open-top design makes rope insertion and cable removal effortless, especially when guiding cable along straight runs or over outside vertical risers. The one-piece, high-strength, die-cast aluminum frame delivers unmatched durability without the weight. Flexible mounting options let you install this roller above or inside the tray using the HB3AX48 crossbar or on the side of the tray using the STC Side Tray Clamp. When speed, strength, and versatility matter, this roller delivers.