Features: The Automatic Line Marking System effortlessly creates precise construction lines with single handed operation, eliminating multiple worker coordination for improved job sites efficiency. Featurings a leakproof double layer ink chamber and rapid rewinding thread mechanism, this tool ensures clean operation while saving time on setups and cleanup. Suitable for construction professional, carpentry, and DIY enthusiasts requiring accurate measurements in demanding environment. Ideal for marking wall alignments, or flooring layouts at building sites, renovations projects, or home improvement tasks. Engineered with plastic housing and high strength cotton thread, delivers crisps marking for not error construction planning and execution. Specifications: Component:ABS Size: Ink bucket diameter 100mm/3.94'' Attribute: Cotton thread length 50meters/164Ft Ink chamber capacity 50ml Package Includes: 1Piece Carpentry Ink note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.