Piranha Blade 3"W x 10"L PHB169 The Equalizer Piranha blade uses the same cutting technology as the original HydroBlade but also incorporates serration on a portion of each side of the blade, making a cutting action from left to right and right to left much easier. Piranha Blade 3"W x 12"L PHB174 The Equalizer Piranha blade uses the same cutting technology as the original HydroBlade but incorporates serration on portions of each side of the blade, making the cutting action from side to side much easier. Piranha Blade 3"W x 14"L PHB175 The Equalizer Piranha blade uses the same cutting technology as the original HydroBlade but also incorporates serration on a portion of each side of the blade, making a cutting action from left to right and right to left much easier. Please Note* This Blade is used for only Equalizer Tools