The DEWALT 5140099-98 Blade Chuck is a replacement blade retention component designed for compatible DEWALT and Delta scroll saws. This package includes (2) blade chucks for routine maintenance or keeping a spare on hand. Each blade chuck securely holds the scroll saw blade in position during operation, helping maintain proper blade alignment for accurate and consistent cutting. Constructed from durable metal, these model-specific replacement components are designed to withstand repeated blade changes and regular workshop use. They are intended for servicing compatible scroll saws requiring part number 5140099-98. Compatible models include the DEWALT DW788, DW788L, and DW788LS Scroll Saws, as well as the Delta DW788BL Scroll Saw. Always verify your tool model and required part number before purchasing to ensure compatibility.