1. Speed of Rotation:

* Tachometer: This instrument measures the rotational speed of an object, typically in revolutions per minute (RPM). It can be mechanical, electronic, or optical, and is used in various applications like engines, motors, and machinery.

2. Correct Shape:

* Coordinate Measuring Machine (CMM): This machine uses probes to measure the dimensions and shape of an object with high precision. It is widely used in manufacturing to ensure parts meet design specifications and quality standards.

Other possibilities:

* Profilometer: This instrument measures the surface roughness and shape of an object.

* Spectrometer: This instrument analyzes light to identify the composition of a material or to measure the shape of objects based on their light scattering patterns.

To give you a more accurate answer, please provide more context about the specific object and the type of measurement you need.