bush hammer tools create a bush-hammered profile on concrete, ideal for use on exterior spaces and creating anti-slip surfaces. They also work great for removal of thin coatings when prepping the floor for epoxy application. These agressive concrete texturing tools can be used on any electric LAVINA grinder as well as other grinders on the market that use a QuickChange adapter plate. Bush hammers are not recommended for use with high rpm machines, such as LAVINA propane machines. typically, you should use bush hammers with no more than 700 rpms.