The eccentric drilling tools contain the pilot bit, the reamer, and the guide device.
The outside dia. and wall thickness of the casing tube can be matched are as follows:
outside dia.(mm)      wall tickness(mm)
108                         6
114                         6
142                         7
168                         8
178                         9
183                         10
195                         6.5
219                         7
219                         12.5
273                         6.5
273                         11.5
A variety of types can be choosed by you.