The Starrett SB6-A Reciprocating Blade Kit contains a selection of unified shank 3X POWER Bi-Metal reciprocating blades. They provide up to three times the life and increased cutting rates compared to our previous line, setting a new level for performance and value on the market. With an optimised tooth pitch for a reduction in vibration, offering cleaner cuts and less fatigue. They are unbreakable; providing safety and reliability.