The Jiffy Mixer is a heavy duty, extremely efficient, industrial/commercial mixer, specially designed for tough-to-mix, viscous materials. Mixes quickly and thoroughly without splashing or whipping air into the mix. The patented protective ring design prevents puncture or damage to the mixing container. Made entirely of stainless steel 304 for maximum durability. Jiffy mixers fit all 1/4 to 3/4 inch chucked power tools. Tools with 450-700 rpm give the best mixing results.