Hitachi 711099 SDS Adapter & Chuck 2 - 13mm The Hitachi 711099 allows you to adjust the drill chuck by hand and tighten it without using a key. When used with an SDS+ drill you will be able to use conventional drill bits. Features: Convert your SDS Plus Chuck into a 13mm Keyless Chuck For use with SDS+ Drill to allow you to use conventional drill bits Saves time and effort Please note, you may receive either a Hitachi or HiKOKI branded adaptor. Both are the exact same item and serve the exact same purpose. The only difference is the branding on the packaging. HiKOKI is the new brand name for Hitachi. Specification: 2-13mm