ProChalk Semi-Permanent Waterproof Marking Chalk RL-H5B Accessory Multi-functional Device: Offering 4 different

Multi-functional Device: Offering 4 different functions

It features automatic locking that makes the 1-inch wide nylon coated blade to stay out without the user needing to engage a lock

and directional arrows

It can last up to 10 times longer than ordinary molded wax crayons

hard terrain

ProChalk Semi-Permanent Waterproof Marking Chalk RL-H5B Accessory Multi-functional Device: Offering 4 differentThe Keson ProChalk Semi Permanent Waterproof Marking Chalk is intently designed for exterior applications including concrete layout, roofing, and metal fabrication. With its water resistant feature, this marking chalk is perfect even in tough conditions. Comes in two colors and seven sizes, the Keson chalk is every surveyor's choice. Configuration Options The Keson ProChalk Semi Permanent Waterproof Marking Chalk is available in different colors and