Silverline - 10PK RECIPROCATING SAW BLADES (150 & 240MM) - 783087 Contains 3 metal cutting, 4 wood cutting & 3 pruning blades. Metal Use for straight & fine cuts in metal.18TPI. 1.4mm tooth pitch. 150mm. Wood Use for curved, fine & fast cuts in wood. 6TPI. 4.2mm tooth pitch. 150mm. Pruning Use for pruning green wood & roots. 5TPI. 4-6.5mm tooth pitch. 240mm.