12" SDS-Max Core Bit Adapter for 1-1/2" to 6" Bits 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: 12" Long For 1-1/2" to 6" Core Bits 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.