Fowler 54-004-255-0 Xtra-Value Digital Depth Gage and Poly-Cal Measuring Set, 0-6”0-150mm


The Fowler 554-004-225-0 Poly-Cal measuring set includes an Xtra-Value Digital Depth Gage and a Poly-Cal Electronic Caliper.

Product Description

The Fowler 54-004-255-0 Xtra-Value Digital Depth Gage and Poly-Cal Measuring Set is useful for measuring inside and outside dimensions and depth. These tools come with a polycarbonate frame, a large display that’s easy to read, and incremental and absolute measurement modes. It measures in inches, millimeters, and fractions of half-inches. Use the five rods to measure up to 16″/440mm.

This particular set includes the Xtra-Value Digital Depth Gage, an electronic depth gage that measures in inches, millimeters, and fractions of half-inches. It also has a zero setting and direct metric/inch conversion options.

Also included in this set is the Poly-Cal Electronic Caliper, which has an accuracy of ± 0.008″/0.20mm and 0.0005″/0.01mm/1/64′ resolution. Durable and versatile, the 54-004-255-0 set can provide measurements for a wide range of applications.

Poly-Cal Features:

  • Range 6″/150mm
  • Resolution 0.0005″/0.01mm, fractions by 1/64 increments
  • Polycarbonate frame
  • Absolute/Incremental measurement
  • Direct inch/metric/fraction conversion
  • 4-way measuring
  • Large easy-to-read display

Xtra-Value Depth Gage Features:

  • Range: 16″/400mm
  • Resolution: 0.0005″/0.01mm
  • (Fractions in 1/64″ increments)
  • Spring-loaded with a hold measurement
  • button for ease-of-use
  • Super-large display
  • Travel: 0-1″/25mm


  • Carpentry
  • Construction
  • Industrial
  • Manufacturing
  • Automotive
  • Mechanical Engineering
  • Aerospace


  • Measure the depth of holes and cavities
  • Check that holes and slots are deep enough for their intended use
  • Measure the height of pins and pillars
  • Measure inside, outside, depth, and step dimensions

About Fowler High Precision

Fowler High Precision specializes in high-quality precision tools made to the exact standards of their customers. Since 1946, they have had a track record of innovation and excellence in metrology. Now, Fowler manufactures a wide range of products, from hand tools to 3D measuring. Their mission is to make measurement easy for all. 

1-Year Warranty for Hand Tools

Fowler provides a 12-month warranty for defects in quality or materials on hand tool products sold in the United States, Canada, and Mexico. You must buy hand tools products from Fowler High Precision or an authorized Fowler distributor to qualify. Fowler reserves the right to require proof of purchase and/or a completed purchaser warranty registration for any warranty claim. To be valid, complete the Warranty Registration within 30 days after the original purchase online at

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Additional Information

Weight 2 lbs
Depth Range


Depth Resolution


Depth Accuracy

± 0.001"/± 0.02mm

Depth Repeatability


Depth Display

LCD(10.0mm high)

Depth Max. Measuring Speed

120" per second

Depth Measuring System


Depth Operational Temperature Range

0° C to + 40° C


Inch/ Metric/ fractions in 1/64" increments

Depth Functions

On/Off; Zero Setting; Hold; Change Measuring Standard

Depth Relative Humidity


Caliper Range


Caliper Resolution


Caliper Accuracy

6"/150mm: ±.001"/.02mm

Caliper Repeatability


Caliper Display

LCD (7.0 mm high)

Caliper Max. Measuring Speed

120" per second

Caliper Operational Temperature Range

0°C to +40˚C

Caliper Relative Humidity


Caliper Functions

On/Zero; Zero Setting; Change Measuring Standard; Absolute/Incremental; RS323 Data Output




3V, type CR 2032 Lithium (part #54-350-100-0)

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