While not really required for trackwork construction, every respectable modeler should have a quality square close at hand. This is a high quality,
Stainless Steel 3 x 4 L-Square Ruler
uxcell (a13110700ux0020) Stainless Steel Right Measuring Angle Square Ruler, 30cm, Silver Tone
SOSW-Teacher 0-30cm 0-20cm Measuring Range L Shaped Design Square Ruler Black
Made from .022″ thick stainless steel With 1/32″ measuring intervals Metric equivalents on back One ruler – photo shows both sides!
Zona 37-434 L-Square, Stainless Steel, 3-Inch x 4-Inch
40x20 Stainless Steel L Square Ruler, Extra Large Long Carpenter Framing Tool, 100 cm x 50 cm
Uxcell L Square 200x300mm/8x12inch Steel Metric Inch Double Scale Angle Ruler
L-Square 1pc L-Square Stainless Steel Carpenter's L-Square 9045Steel Rulers Angle Ruler for Measuring (Silver), Size: 9.5x9.5x9.5CM
3x14 Acrylic Ruler – Club Scrap
Product Name : Square Ruler;Material : Stainless Steel Measure Range : 0-30cm;Total Size : 30 x 13x 1cm /11.8 x 5 x 0.4 (L * W * Max.T ) Weight
uxcell 30cm 12 90 Degree L Shape Square Silver Tone Ruler Tool
L-Shaped Framing Square Stainless Steel 90 Degree Right Angle Square Ruler Carpenter’s Square Metal Measurement Square Tool(300mm*150mm)