POCKETBOY is available in two blade lengths: 5-inch (130 mm) and 6-3/4-inch (170 mm). The blades are interchangeable within the same blade length. Every blade length is available in four teeth sizes/configurations (tpi - teeth per inch): 7 tpi - Large/Coarse (pruning, green wood), 8.5 tpi - Medium (soft wood), 17 tpi - Fine (hard wood, bamboo), and 22 tpi - Extra Fine (dry hard wood). Each POCKETBOY has a color-coded handle associated with the teeth configuration: Red - Large teeth, Black - Medium teeth, Yellow - Fine teeth, and Purple - Extra Fine teeth.