Kzubr 1700w Demolition Hammer / Heavy Duty Concrete Breaker /

From the box, the Makida 2200W Demolition Hammer appears to use a HEX 30mm (1-1/8") chuck/tool holder, which is the standard size for heavy-duty demolition hammers in this class. Chuck Type: HEX Shank Chuck Size: 30mm (1-1/8") Power: 2200W Motor: 100% Copper Impact Rate: 1800 BPM If you have a photo of the specifications label on the box, I can confirm the exact chuck size.