SCR-113 Screw Extractors Set. With 1.25, 1.5 & 2mm Blades. SCR-113-A. Screw Extractors Set. With small 1.25mm with Reversible Blade. SCR-113-B. Screw Extractors Set. With medium 1.5mm with Reversible Blade SCR-113-C. Screw Extractors Set. With large 2.0mm with Reversible Blade.