UNIQUE I-BEAM CONSTRUCTION: Allows blade to tension up to 50,000 psi, resulting in fast, straight cuts. CONVENIENT BLADE STORAGE: No tool needed to store up to 5 extra blades. CONVERT TO A JAB SAW: Accepts any LENOX Reciprocating Saw Blade. COMFORTABLE GRIPS: Rubberized handles allow for confident handling even in wet or cold environments, All Hacksaw frames come with one 12" (300mm) 24 TPI hacksaw blade