hilitand 7pcs 16mm pipe dredge cutter heads,dredge spring automatic head locking head/gear/cutter head hilitand specification:<br> color: black<br> material: manganese steel<br> collet diameter :16 mm<br> fit for: dredging machine<br> weight: approx.220g/7.8oz<br> <br> package list:<br> 6 x cutter head<br> 1 x key<br>