SWT HYDRAULIC ROCK HAMMER ATTACHED TO 20 TON EXCAVATOR We also can supply silence type and side type if you need. Features: 1.Top and open design, easy for maintenance 2.Simple design, parts can exchanging quickly, economic cost 3.Longer operation range for distance working project 4.More powerful cause of vertical body design Sepecification Hydraulic Rock Hammer ST140 Tool Diameter:140mm Operation Weight:2030kg Carrier Weight:18-26 ton Working Pressure:160-180 Kg/CM�² Hydraulic Flow:120-180 L/Min Impact Frequency:350-500Bpm Impact Energy:4500J Hose Diameter:1'' inch If you want to add quick coupler to exchange the attachments quickly.You aslo need to check the pins distance too.Please check following picture. We ourselves are offering quality after sales service, and we also request our distributors have the same quality serivce idea to our users. We also set some overseas parts branch for quick parts delivery.