General description Set of 4 (including 2 cord pulleys and 2 cord locking mechanisms) with a white plastic swivel and stainless steel bracket. Made of high-quality plastic and reliable stainless steel, these cord accessories are sturdy, durable, lightweight, secure, and long-lasting. Cord accessories are available in thicknesses of 1.4 mm, 1.6 mm, 1.8 mm, 2.0 mm, and 2.2 mm. Pulleys and locks are used to connect bamboo blind cords, making pulling the cord easier. They can be installed on either the left or right side.