Home » Hobby Tools » Scale Rulers   Manufacturer: Excel Hobby Blades Corp. Excel - 12 Inch Scale Model Railroad Rule Details  EXC55777 - Excel 12 Inch Scale Model Railroad Rule. Made of stainless steel. scales in N, HO, S and O. List Price: $12.73 Price: $8.36 Manufacturer: Excel Hobby Blades Corp. Excel - Deluxe Model Railroad Reference Ruler Details  EXC55778 - Excel Deluxe Model Railroad Reference Ruler. calibrations in N, HO, O and G (1/24) scales. List Price: $12.73 Price: $8.36 Manufacturer: Excel Hobby Blades Corp. Excel - Deluxe Scale Model Reference Ruler Details  EXC55779 - Excel - Deluxe Scale Model Reference Ruler. 1/72, 1/48, 1/35, 1/25, and 1/24 scales. Excel #55779 List Price: $12.73 Price: $8.36 Manufacturer: Excel Hobby Blades Corp. Excel - Precision Square Tool Details  EXC60021 - Excel Precision Square Tool, 6 inch Machine Square 90 degree angle. These light and heavy duty carbon steel squares are precisely made to assure angle accuracy. List Price: $17.99 Price: $12.59