SPECIFICATIONS:

* A well balanced, machined aluminium disc plane .

* The disc moves on bush/ball bearing

* has number of holes placed symmetrically in concentric circles of known diameters.

* Four pins carrying scale pans can be inserted into the holes at any desired position.

* Complete with horizontal graduated mirror scale ,

* plumb line,

* leveling screw,

* two side pulleys and 4 scale pans.