Clear, easily-read numbers, properly sized for the tool
Fine adjustment thumb roll for precision measurements
Hardened base is 3-15/16" (99mm) long, but optional base extensions of 7" and 12" (175 and 300mm) are available.
Hardened stainless steel body and slide for long life
Hook attachment, to take readings from the edge of a work piece to edges of slots, grooves, shoulders, and other I.D. length dimensioning.
Inch/millimeter conversion
Lock to hold the slide in position
One-year minimum battery life with furnished 3-volt battery, CR2032
Spacing between holes is 2-3/4" (70mm).
The removable hook has the screw permanently attached to prevent loss.