Vallorbe® Triangular Chisel Bit File is designed for sharpening full chisel square cut chains. With a size of 4.5mm x 4.5mm x 4.5mm, this file offers precision and efficiency for square cutter saw chain sharpening. Perfect for advanced amateurs and professionals, Vallorbe triangular chisel bit files are a must-have for any workshop. Find the edge you've been missing with this high-performance tool.