Protractors and Triangles
Whether you’re a student or a professional engineer, LD Products has the tools to help you succeed. Find premium protractors, triangles and complete drawing sets.
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20,000,000+ Orders Shipped Since 1999 | Free Shipping on orders over $50* | Lifetime 100% Satisfaction Guarantee
- Enjoy Free Shipping on orders over $50*
- Low Flat Rate Shipping - only $5.99 on orders under $50*
- Multiple Fulfillment Centers - so you get your order faster!
- Orders placed before 4pm usually ship the same day!
*Applies to orders delivered to the lower 48 states.
- Reliability for a Lifetime - All of our LD brand compatible ink and toner cartridges are backed by a lifetime guarantee.
- Verified Excellence - Our cartridges have been tested for performance, quality and page yield, so you know you are getting the absolute best product available.
- Your Happiness Matters - In the event that you are dissatisfied with your purchase, simply let us know - we'll do our best to make it right.
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Reliability for a Lifetime
Our 100% satisfaction guarantee means you can shop with peace of mind. Our cartridges have been tested and monitored for performance quality and page yield. In the event that you are dissatisfied with your purchase, we will do our best to make it right. All of our LD-brand compatible ink and toner products are backed by a lifetime guarantee.