About This TOP QUALITY - Made of high-quality stainless steel material, the whole pully has higher hardness, moisture resistance, corrosion resistance, rust resistance than ordinary materials. Rugged construction and shock-resistant design make it extremely rugged. 360째 FREE ROTATION - The rotating head of small pulley are solid cylindrical head, which can be rotated 360째, prevent the rope/wire knotting and easy to use. The flexible pulley has heavy load capacity and is suitable for a variety of applications. SMOOTH & NO BURR - The rope pulley is specially polished, so the surface is flat and shiny. Flexible pulley with heavy-duty capacity for indoor and outdoor applications. SMALL VOLUME with HEAVY LOAD - 4 Pcs x M15 Single Pulley Block, 58 * 19mm / 2.3 * 0.75in (Length * Width), Max Load: 45kg. WIDE APPLICATION - Rope pullies are suitable for wire rope/cord to pass and pull objects. Perfect for clothesline pulley, boats, mining, dog leashes, garages, key chains, camping, fitness, small diameter cables, curtains, rock climbing, hanging objects.