Grip_PU17 Punch: PU17 PU17 - Test nail Test nail and support plate for ASTM C473Head diameter: ¼” (6.4mm)Shank diamer: 0.099″ (2.5mm) LengthWidthDiameterWeightPU17-2.545.00mm 2.50mm Standards ASTM C473: Standard Test Methods for Physical Testing of Gypsum Panel Products