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Tekace 15cm 20cm 25cm PCB Ruler Multifunctional EDA Measuring Tool For Electronic Engineers Science Lab15CM PCB Ruler Material: PCB Font size guide, trace-width diagram, and a set of AWG-sized drills Centimeter side: 0.1cm marks 20CM PCB RULER Positive Specifications: The measurement length: 20 cm Measuring length : 7.8 inches Commonly used packages: SOT89, SOT8, SOP16, SOT363, 3225, SOD80, MARK, TQFP64. Commonly used resistance and capacitance patch package0201,0402,0603,0805,1206,1812,3216,3528,6032,7343. Common bore diameter reference dimensions (unit: mm) Slot for hanging straightedge Back Specifications: Commonly used line width reference (unit: mil) Angle measurement: 180 degrees Device, IC pin spacing table: 0.5mm, 0.635mm, 0.65mm, 0.8mm, 1.0mm, 1.27mm, 2.0mm, 2.54mm; Commonly used MOS, diode, transistor package: SOT23, SOT223, SOT25, TO252, D2PAK, SMA, SMB, SMC. 25CM PCB RULERPositive Specifications: The measurement length: 25cm Measuring length: 10 inches Commonly used IC package:1.NAND_FLASH_TSOP48 2.QFP7X7-64 3.PLCC-20 4.SOP16 5.TSSOP24 6.SSOP8 7.SOP8 Commonly used CHIP component: 1.TO252-3 2.SOT223 3.SOT89-3 4.SOT23-6 5.SOT23-3 6.SOD123 7.SOD323 8.1210 9.3528 10.1206 11.0805 12. 0603 13. 0402 14.TO92 Common bore diameter reference dimensions (unit: mm): 3.0 2.5 2.0 1.5 1.0 0.8 0.5 0.4 Slot for hanging straightedge Back Specifications: Commonly used line width reference (unit: mm) Angle measurement: 180 degrees Device, IC pin spacing table: 0.5mm, 0.65mm, 0.8mm, 1.0mm, 1.25mm, 2.54mm; Common bore diameter reference dimensions (unit: mm): 3.0 2.5 2.0 1.5 1.0 0.8 0.5 0.4