The HSA 50 battery hedge trimmer features double-sided blades that cut both directions with droplet-shaped cutters that help secure materials in place while cutting. Combined with diamond-ground blades, this high-speed trimmer operates at 2, 800 strokes per minute with minimal vibration and can cut up to 1, 000 feet per charge. The HSA 50 hedge trimmer is compatible with the AK Battery System for homeowners and packs a powerful punch at an affordable price. | STIHL HSA 50 Hedge Trimmer Set