Check the listing for details. RollerKnife by ScreenTight Nylon Screen,Spline Roller & Trim Blade Tool. Color: Yellow, Condition: New. Listed at 14.90 USD. This Screen Tight ROLLERKNIFE is the perfect tool for anyone looking to screen their doors or windows. It is made with high-quality materials that ensure durability and longevity. The nylon screen spline roller and trim blade work together to provide a seamless and clean installation process. With a focus on the brand, ROLLERKNIFE, this screening tool is designed to meet the needs of professionals and DIY homeowners alike. The model, ROLLERKNIFEt, is a trusted name in the industry, and this product is no exception. Made in China, it meets the highest standards for quality and performance. This tool is perfect for those in the business and industrial sector, as well as those in the building materials and supplies industry.