Some of the functions of the collars are as follows:
The parameters used for identifying drill collar specifications are:

Price:
Minimum Order Quantity : 10 Pieces
Finish : Polished
Material : Mild Steel (MS)
Surface Treatment : Hot Rolled
Thickness : 1mm to 5mm
Weight : Depends on size and thickness
Minimum Order Quantity : 10 Pieces
Finish : Smooth, BurrFree, Custom Finish Available
Material : Mild Steel (MS)
Surface Treatment : Hot Rolled, Painted, or as required
Thickness : 5 mm to 200 mm
Weight : Dependent on cut size and thickness
Minimum Order Quantity : 10 Pieces
Finish : Mill Finish
Material : Mild Steel (MS)
Surface Treatment : Hot Rolled
Thickness : 3 mm to 100 mm
Weight : As per size and thickness
Minimum Order Quantity : 10 Pieces
Finish : Mill / Plain / Smooth
Material : Mild Steel
Surface Treatment : Hot Rolled
Thickness : 5 mm to 100 mm
Weight : Variable as per dimension and thickness; Calculated by standard MS plate weight formula