Jacobs 30431D 665 Morse Taper Drill Chuck Sleeve, STD Reducing, is a metalworking accessory designed for Morse taper drill chucks. This standard-reducing sleeve provides a compatible interface for Morse taper chucks in applicable machining setups. Manufactured by Jacobs, the model numbers 30431D and 665 identify the exact sleeve used with Morse taper drill chucks.
