"It is compatible with rotary hammers. The Chuck Adapter for drill chucks connects 1/2-inch-20 UNF chucks to SDS plus hammers.
• Connects 1/2-inch-20 UNF Chucks to SDS plus Hammers • Chuck Adapter for drill chucks connects 1/2-inch-20 UNF chucks to SDS plus hammers • Compatible with rotary hammers
Specifications: Shank: SDS plus For drill bit shank: 1/2"-20 UNF"