2-1/2" Thin Wall Core Bit Due to prolonged, heavy use some components may need to be replaced. Use only Milwaukee specified replacement parts to achieve maximum life and performance from your Milwaukee tool. Features: 2-1/2" Diameter 3" Usable Length For Use with 8" and 12" Shanks Carbide Construction Since its founding in 1924, Milwaukee has focused on a single vision: To produce the best heavy-duty electric power tools and accessories available to the professional user. Today, the Milwaukee name stands for the highest quality, durable and reliable professional tools money can buy.