12pc Universal Support Ring Set For Portable Hardness Testers

This set is designed to let the user confidently test on round (Concave or Convex) parts. Simple threaded design for quick change in the shop or out in the field.

Model No. PHT1500-300 Concave Support Rings

11-13mm round	12.5-17mm round	16.5-30mm round
11-13mm square	12.5-17mm square	16.5-30mm square