Good sampling methods yield accurate results! This low-cost hay and forage core sampler can be used on all bale sizes and all types of baled forages. Stainless steel tip that can be re-sharpened. Cuts a 3/4" dia. x 18" L sample. Chamber holds a single core sample. 1/2" drive shaft. Connects to a portable or AC-powered drill motor equipped with a 1/2" or larger chuck.