OPGW (used for telecom/grid integration) requires zero-twist stringing. Essential tools include multi-sheave stringing blocks (often 4- or 5-sheave blocks for bundled OPGW) and high-capacity puller-tensioners that maintain fiber integrity. A grounding kit is also critical for live-line work. Portable pilot line winders help start stringing on towers. For example, our OPGW pulley blocks and tensioners support Kevlar-fiber core conductors and have been proven in wind farm projects (e.g. Prymorska) to ensure safe, twist-free installation.