Helix Triangular Scale Rule 30cm K93X40 – 12 Scales for Architects, Engineers and Designers

Twelve scales. One rule. No more juggling three different rulers to get the right ratio. The Helix K93X40 triangular scale packs 12 scales into a 30cm body, so whether you're working at 1:50 or 1:200 on a site plan, the number's right there. Architects, engineers, drafters — you know the frustration of a flimsy plastic rule that warps in your pocket. This one's built to sit flat and read true. $11.75 RRP. Add to cart when it's back on the shelf

• 12 different scales in one triangular 30cm rule
• Model K93X40 (K93X70), suited to architectural and engineering work
• Triangular form keeps edges sharp and readings accurate
• 30cm length covers most standard drafting and site-plan tasks