The Oster Clipmaster Top and Bottom Clipper Blade Set works with the Oster Clipmaster Clipping Machine to provide professional, precise results. Designed for detailed clipping on horses, lambs, and cattle, this replacement blade set includes both an 83AU top blade and an 84AU bottom blade. Oster metal clipper blades are produced from the finest high-carbon steel. Each blade is handcrafted to rigorous standards and then sharpened, finished, and tested using Oster's proprietary processes to ensure exceptional sharpness and durability.