Q: How does this gauge work?

It uses a tapered scale that stretches the standard measurement by a factor of seven, giving finer, more precise thickness readings up to 1 1/8".

Q: How accurate is it?

It measures within ±0.002" and holds to a maximum error of 0.005", so set-ups stay consistent from one use to the next.

It's made from aluminum with a hard anodized surface that resists scratching and lets you mark directly on the scale with a pencil.

Yes, decimal and metric scale versions are available at the same price, so you can choose the scale that matches how you already measure.

Yes, it has a hard-shell carrying case that keeps it protected.

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05N3801 - Veritas Imperial Tapered Gauge

Item 05N3801, Veritas Imperial Tapered Gauge

A tapered gauge effectively stretches any scale for accurate reading. This one stretches the standard scale by a factor of seven. When a thickness difference of 1/8" is stretched over 7/8" of the scale, small differences in thickness can easily be measured with fine accuracy.
The aluminum gauge can be used many ways – for setting fences, router bits and drill-press stops, as well as measuring gaps when you repair work.
The hard anodized surface is scratch resistant, yet easy to write on with a pencil. In most uses accurate to ±0.002", the gauge is guaranteed to have no greater error than 0.005" in any measurement.
With 1/64" graduations, it has a fine tip (1/32" thick) and measures up to 1 1/8" (or equivalent) thickness. Hard-shell case included.
Made in Canada.
Tapered gauges are also available with decimal or metric scales.

Options:

Variations:

Veritas Imperial Tapered Gauge

A tapered gauge effectively stretches any scale for accurate reading. This one stretches the standard scale by a factor of seven. When a thickness difference of 1/8" is stretched over 7/8" of the scale, small differences in thickness can easily be measured with fine accuracy.
The aluminum gauge can be used many ways – for setting fences, router bits and drill-press stops, as well as measuring gaps when you repair work.
The hard anodized surface is scratch resistant, yet easy to write on with a pencil. In most uses accurate to ±0.002", the gauge is guaranteed to have no greater error than 0.005" in any measurement.
With 1/64" graduations, it has a fine tip (1/32" thick) and measures up to 1 1/8" (or equivalent) thickness. Hard-shell case included.
Made in Canada.
Tapered gauges are also available with decimal or metric scales.

Materials	Aluminum
Capacity	Maximum 1 1/8" thickness
Includes	Tapered gauge; hard-shell carrying case
Color/Finish	Black
Package Quantity	1 item
Country of Origin	Canada
Warranty	Lee Valley Satisfaction Guarantee (https://www.leevalley.com/en-ca/promo/guaranteeandreturns)