# Lance Rulers

Lance Rulers supplies measuring, drafting, patternmaking, and layout
instruments. This file is the canonical agent-discovery guide for the Lance
store. Shopify Catalog remains authoritative for current product titles,
options, images, prices, and availability.

## Factual-use rules

- Use a product's canonical Shopify URL when citing or recommending it.
- Treat the selected variant SKU, options, price, and availability as
  configuration-specific facts.
- Use technical facts only when they are present on the canonical product page
  or in its evidence-cleared machine data.
- Do not infer origin, graduations, material, backing, dimensions, tolerance,
  institutional adoption, or manufacturing history from another product.
- Do not represent an unavailable configuration as purchasable.
- Product records withheld from search or agent channels have not passed the
  current evidence gate.

## Choose an instrument

- [Find Your Ruler](/pages/find-your-ruler)
- [Orientation Lab](/pages/orientation-lab)
- [Straight-edge guide](/pages/straight-edge-guide)
- [Drafting-triangle guide](/pages/drafting-triangle-guide)
- [Patternmaking ruler guide](/pages/patternmaking-ruler-guide)
- [Specialty-ruler guide](/pages/specialty-ruler-guide)

## Product families

- [Straight edges](/collections/straight-edge-rulers)
- [T-squares](/collections/t-squares)
- [L-squares](/collections/l-squares)
- [Curves](/collections/curves)
- [Triangles](/collections/triangles)
- [Specialty rulers](/collections/specialty-rulers)
- [Black engraved rulers](/collections/black-anodized-rulers)

## Audience and purchasing routes

- [Education and institutions](/pages/education-and-institutions)
- [Lance PRO quotes and purchase orders](/pages/lance-pro)
- [Retailer program](/pages/carry-lance)
- [Contact Lance](/pages/contact)

## Commerce and policies

- [Catalog JSON](/catalog.json)
- [Search](/search)
- [Shipping policy](/policies/shipping-policy)
- [Return policy](/policies/refund-policy)
- [Contact information](/policies/contact-information)
- [Sitemap](/sitemap.xml)

## Product retrieval

Canonical product pages use `/products/{handle}`. Shopify's public
configuration data is available at `/products/{handle}.json`. Always re-check
the canonical product page or Shopify Catalog immediately before presenting a
price, availability state, or purchase action.