Adapter is specifically designed to convert the SDS Max chuck of a rotary hammer into an SDS Plus chuck, providing a secure and reliable connection between the tool and the accessory., Adaptor is constructed from high-quality materials to ensure durability and long-lasting performance, even under heavy-duty use., With the SDS Max to SDS Plus adapter, you can expand the range of applications for your SDS Max rotary hammer; allows you to use SDS Plus shank drill bits and chisels.