Product Description

Penetration Depth- Its' distance is precisely made gaging elements enters a fastener's recess. This is usually less than the "recess depth". The measurement is an indication of how deeply a driving bit will engage in the recess. 

Recess Depth- the deepest point in a fastener's recess. With a sharp point in the center of the recess, these gauges are used to determine if recesses in the heads of screws are within the allowable tolerance specified in dimensional tables. 
 
Measure application-
Socket types: Recess size 2.*0mm, 3.*0mm,4.*0mm, 5.*0mm, 6.*0mm,8.*0mm,*0.*0mm

Torx types: Recess sizes T*6, T*8, T**0,T**5, T**0, T**5, T**7, T**0, T**0, T**5, T**0, T**5