Superior quality: The crane block is made of excellent 45# steel material, with high resistance, good stability, low fluctuation, wear resistance and chemical resistance, robust and durable stability for long-term use.

Easy to use: Rotating blocks can be used with ropes or lines indoors or outdoors for a flexible shift. The smooth roller ensures good movement of the rope. The upper part is fixed and the rope is easy to handle.

Practical design: Double roller bearings slide stably and smoothly, facilitating the gate's sliding indoors or outdoors for a flexible shift. With a compact, easy-to-use structure.

Wide range of applications: Suitable for sliding doors, rail doors, various types of angle iron, angle iron rails, etc. Can be used for home training equipment, exercise equipment and blocks.
Or blocks for internal and external ropes, clotheslines, blocks, etc.

Package contents: You will receive 4 V-groove rollers; Widely used in vehicle manufacturing and other automated production lines and various general mechanical equipment.