Bosch Rotary Hammer 11264EVS RT 1 5 8 Inch Combination Reconditioned Thirteen Amp Motor Six Point Five Foot Pounds Impact Energy SDS Max Concrete Boring Sanders it installs seamlessly on a it installs seamlessly on a wide range of walk behind and handheld saws 90 Tooth Ratchet: Minimal 4 degree arc swing allows for high productivity in restricted or narrow spaces Reinforced Concrete Boring: Driving large diameter anchoring holes and pipe penetrations through aggregate concrete floors or structural foundation walls This continuous lubrication prevents aggressive operational friction heat and grit galling within the heavy internal anvil