Groz Center Square, 3" Work Diameter, Hardened Spring Steel with Precision Ground Knife Edge, Machinist Centering Tool for Round Stock, Shafts and Bar (3522)

Groz Center Square, 3" Work Diameter, Hardened Spring Steel with Precision Ground Knife Edge, Machinist Centering Tool for Round Stock, Shafts and Bar (3522)

• STOP MISCENTERING ROUND STOCK - Locate the exact center of shafts, bar, and pipe up to 3" OD in seconds; no math, no scribing trial-and-error, no scrapped parts on the lathe or drill press.
• HARDENED SPRING STEEL BUILD - Body is hardened and ground from spring steel so the knife edge holds its reference geometry through years of toolroom and production layout use.
• PRECISION GROUND KNIFE EDGE - Sharp, true contact edge registers cleanly against the OD of round stock so the rule slot projects the centerline accurately every time.
• MACHINIST-GRADE LAYOUT ACCURACY - Built for machinists, toolmakers, and fabricators who need repeatable centering before drilling, tapping, turning, or cross-hole work.
• 3" CAPACITY, RULE-COMPATIBLE - Accepts a standard steel machinist rule through the slot to scribe true diameters across center on shafts, round bar, tubing, and cylindrical workpieces.