News. 1  Proctorâs and Paceâs Chapel joined to make one church. 2  Prepare for the unexpected repair bill. 3  Managing your spring allergies.  Health 1  Inspections. âItâs our people that make the differenceâ.  MADSOCIAL: Women of the Frontier returns to Fort 1  Boonesborough. Daniel Boone memorabilia collection  opens.
A micrometer is a measurement device incorporating a calibrated screw used widely for precise measurement of small distances in mechanical engineering and machining as well as most mechanical trades. The first micrometer was developed by Jean Laurent Palmer of Paris in 1848.
The blade micrometer measures narrow grooves and keyways. Blade micrometer is used for measuring where the standard micrometer spindle could not be accommodated. combination set. Combination set is used as a rule, a square, a miter, a depth gage, a height gage, and a level. Combination set. The combination set consists of: blade, center head, protractor head, combination square head, scribe, and spirit level.