Quick-Mix, 28", Mud Mixer, 8-1/2" x 4-1/2" Blade, For Stirring & Blending Paint, Drywall Mud & Acoustic Quickly & Lump-Free, Blades Securely Welded To 3/8" Hex Shaft, Fits Any 3/8" Or Larger Slow-Speed Drill 500 RPM.