An Aven Spring Inside Caliper is a precision measuring tool designed for gauging internal dimensions, such as the inside diameter of a tube or the width of a slot. These calipers are commonly used in metalworking and machining where measurements are taken by "feel" and then transferred to a ruler for reading.
TECHNICAL DETAILS:
Material
High-grade Steel (M.S.) or Stainless Steel
Typical Accuracy
Accuracy depends on user feel; some sources cite up to 0.005 mm for specialized variants
Hardness
Hardened working edges, typically around55 HRC
Adjustment
Solid nut or quick-release nut for fast positioning
