Detailed Product Description SUITABLE FOR USE WITH HITACHI DHOSA,DHOSA1,H55SA, H55SC.KANGO 710KV,760KV,800KV,810KV,850KV,900, 900X,900KV 928,850,950K,950X,1400KV. MAKITA HM1200K,HK1400K,HR3850K,HR5000K. RYOBI CH485K,450K,460PK It's called 2" wide chisel Kango K9 21mm fitting. (wide chisel,kango,chisel) We can do the sizes as your inquiry.