• Made with engineering plastics PA6, offering great strength and durability. • User-friendly design for efficient work. • Allows simultaneous work on multiple walls. • Includes 25 feet of nylon wire. • Material: Engineering plastic. • Opening size: 9-12 cm. • Total weight: 172 g. • Package composition: 2 clips of 25 feet nylon wire line. • Instructions for use: Attach the clip to the brick, wrap the cord, and hook it into the slot. Repeat on the other side and straighten the cord to use it as a guide in masonry. Move to the next layer after placing the bricks.