Users of these (2) Jiffy Mixer HS-1 paint mixer blades have the option of permanently affixing them to any electric power tool with a 1/4” chuck. The HS-1 blade is made of 304 polished steel and measures 10.25 inches long to reach the bottom of most 2 gallon paint containers. This mixer blade is rated for medium jobs, offering a max rotational speed of 1,200 rpm. However, the most efficient mixing will be performed with a power tool generating 450-750 rpm.