Imperial Blades' Starlock™ 3-3/8 Thin Metal Segment Blade is composed of high speed steel (HSS) for greater hardness and wear-resistance. Segment blade shape is ideal for working in corners and on edges without over cut. Recommended applications are: Thin Metal, Wood, Fiberglass, PVC and more. Popular projects include long, straight cuts in sheet or thin metal for ductwork. Compatible with Starlock™ multi-tools: Bosch and Fein. Also fits non-Starlock multi-tools: Milwaukee, Ridgid, Makita, Rockwell and more. Recommended applications: Thin Metal, Wood, Fiberglass, PVCSegment blade ideal for working in corners and on edges without over cutPopular projects: Long, straight cuts in sheet or thin metal for ductworkStarlock Fitment: Compatible with Bosch, Fein, Milwaukee, Makita, Rigid and RockwellCompatible with Starlock™ multi-tools: Bosch and Fein. Also fits non-Starlock multi-tools: Milwaukee, Ridgid, Makita, Rockwell and more!3-3/8" (86mm) HSS