T-Square Drawing Special Student T-Ruler T-Ruler Mechanical Engineering Drawing Ruler Large Triangle Plate Ruler Handmade Utility Knife $ 10.89 Product information: Color classification: A: 20cm ruler (not T-square) B: Effective length 12CM (30+45 degrees) 2 packs C: Effective length 17CM (30+45 degrees) 2 packs D: Effective length 22CM (30+45 degrees) 2 packs E: Effective length 27CM (30+45 degrees) 2 packs F: Effective length 32CM (30+45 degrees) 2 packs G: Effective length 37CM (30+45 degrees) 2 packs. Packing list: T-square x1
