Depth Attachment, Angle and Blade Vernier is basically a depth gauge system. Made of stainless steel, this laboratory instrument comprises of a metal bar that resembles to vernier scale and steel rule. As a suitable calibration instrument, this Depth Attachment, Angle and Blade Vernier in such a way that single or both side of its flanges appears flat. Wide calibration process coverage area and simple installation method are the key characteristics of this instrument. Standard of this instrument has been verified on the basis of its measurement precision level, mechanism, speed of measurement, consistency of operation, service life and diameter.