Neary Model 440 Rotary Blade Grinder Sharpener Neary model 440 rotary blade grinder. Sharpens all types of blades including standard design and mulching styles. Industrial 1/2 HP 3450 RPM motor, totally enclosed for long life. Precision balanced, 8" x 1" aluminum oxide grinding wheel. Guide adjusts for blades sharpened from 20 - 40 degrees. Sharpen blades that rotate clockwise and counter clockwise.