• Edition of 600
• Glossy black and white concentric circle exterior
• Translucent transcendental “digits of pi” interior
• Polarized silver smoke lenses with a π lens etch
• Silver hardware
• FDA approved impact resistant lenses with full UV400 protection
• Casio-style electronic calculator microfiber pouch
• Includes a Charles Leonard CHL77360 bullseye metal compass
• Hand-numbered edition card

Size Guide

These Pi Fort Knocks feature a glossy black and white concentric circle exterior frame (so you can hypnotize a secret crush), a translucent transcendental “digits of pi” interior, silver hardware, and polarized silver smoke lenses with a π lens etch. Designed on our durable and high quality frame, these sunglasses have a slightly wider fit than our other frame styles and provide full UV400 sun protection.

Every pair comes with a Casio-style electronic calculator microfiber pouch, a hand-numbered edition card, and a Charles Leonard CHL77360 bullseye metal compass so you can try solving the ancient challenge of squaring a circle with your compass and straightedge.

Knockaround is committed to customer satisfaction. We want to assure you are 100% satisfied with the product you purchased, which is why we offer a 30 day return / exchange period.

• Returned / exchanged items must be in 100% resalable condition (unworn, unused, undamaged)
• Timeframe begins at original purchase date
• All returns and exchanges must be initiated from original point of sale (i.e.: Knockaround.com)

We do NOT currently accept returns or exchanges on Custom Shop orders, Limited Editions, Collaborations, Knock Boxes, Sale Items, or any international orders. All sales of those items are final.

To see full Return Policy information and instructions on how to initiate a return or exchange, visit our Returns page.