b'Jig Saws Bi - MEtal uNiquE UNIFIED SHANKStarrett Unified Shank jig saws incorporate the Starrett exclusive bi-metal unique process technology. Blades made from this process resist breakage, cut faster and last longer than conventional saws. Unified Shank jig saws are available in five-blade packs, twenty-blade packs and in various assortment packs.awS ig S JBU418 BU4245 Blades per Pack 20 Blades per Pack Dimensions*Cat. No. EDP Cat. No. EDP Length x Width x Thickness TPI (25mm) Tooth SetBU36T 68717 BU36T-20 68733 6 Ground TaperedBU36 68718 BU36-20 68734 6 Skip AlternateWOOD CUTTING MULTI-PURPOSE METAL CUTTINGBU38 68720 BU38-20 68736 3 x 5/16 x .050" 8 Regular AlternateBU310T 68721 BU310T-20 68737 (75 x 7.5 x 1.3mm) 10 Ground TaperedBU310DT 68722 BU310DT-20 68738 10 Ground Tapered, Downstroke Cut5 x 3/8 x .050"BU56 68856 BU56-20 68857 (125 x 9.5 x 1.3mm) 6 Skip AlternateBU214 68724 BU214-20 68740 2 x 5/16 x .040" 14 Regular Wavy(50 x 7.5 x 1mm)BU218 68726 BU218-20 68742 2 x 3/8 x .040" 18 Regular Wavy(50 x 9.5 x 1mm)BU214S 68725 BU214S-20 68741 2 x 3/16 x .040" 14 Scroll Wavy(50 x 4.5 x 1mm)BU41014 68723 BU41014-20 68739 4 x 3/8 x .040" 10-14 Varipitch WavyBU418 68727 BU418-20 68743 (100 x 9.5 x 1mm) 18 Regular WavyBU224 68728 BU224-20 68744 2 x 5/16 x .040" 24 Regular WavyBU232 68731 BU232-20 68747 (50 x 7.5 x 1mm) 32 Regular WavyBU224S 68729 BU224S-20 68745 2 x 3/16 x .040" 24 Scroll Wavy(50 x 4.5 x 1mm)BU424 68730 BU424-20 68746 4 x 3/8 x .040" 24 Regular Wavy(100 x 9.5 x 1mm)MULTI-PURPOSECARBIDE GRITBU230X 68753 BU230X-20 68754 2 x 5/16 x .040" Coarse CG Cont. Grid -(50 x 7.5 x 1mm)*Length dimension references tooth bearing section of jig saws. The total length, including blade tang, is approximately 1" longer.34'