kelly bar adapter, also known as kelly square head or kelly box, is one part of kelly bar which used to connect the drilling tools like bucket, auger and casing drive. The most popular size is 200*200mm in Bauer type. We also produce the model like 130*130mm, 150*150mm as requests.

We are capable to offer the Kelly box of Kelly bar for Bauer, Soilmec, Mait, Casagrande, XCMG, SANY, CMV, Sunward, Zoomlion, IMT, Jintai and so on.

Beside the kelly bar adaptor, we also offer swivel, bearing, spring, rubber ring, kelly box, pallet, kelly guide and so on.