Introducing the Milwaukee® steel ring, OD 49 x ID 44.6 x L 9, your ideal choice, for reliability and high performance. Experience the unmatched quality and efficiency Milwaukee® products offer. Use only Milwaukee® specified replacement parts to achieve maximum life and performance from your Milwaukee® tool. Milwaukee® 44-90-5317 Replacement Steel Ring, OD 49 x ID 44.6 x L 9, for use with 5317 SDS-MAX Rotary Hammer