WHOLESALE High carbon steel blade for maximum blade extension. Long-lasting stainless steel spring for smooth operation. Reads to 1/16' graduations. Sliding thumb lock and quick auto return Sliding hook for inside and outside measurements. High-impact ABS case.Illinois Industrial Tools ⚠ WARNING: This product can expose you to LEAD,DEHP, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.