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Special Shipping Requirements

Many rocketry products require special shipping.
Engines require HAZ-MAT shipping See our SHIPPING area before placing an order to avoid delays and further charges.
Any products with HAZ in the description require shipping regulated by the federal government. Other products like fin stock and body tubes may also require special boxes. Please see our SHIPPING listings to learn more before placing an order.

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Commonwealth Rocketry, LLC.

47887 Michigan Ave. Suite 207
Canton, Michigan 48188
734-722-Rocket (7625)
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List Price: $16.99
Price: $15.29

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Build Your Own Fincan Outside The Airframe

The GROOVE-LOK is the latest in fin attachment technology. It epoxies over a 38mm motor tube and makes attaching fins much more efficient. Made of high-strength extruded aluminium, it holds the fins in perfect alignment. It's a fin alignment guide built into the rocket.

Let's face it, attaching perfectly aligned fins the old fashioned way is a bear. You have to aim and drip epoxy down into an impossibly small space while keeping the fins straight and aligned, making sure the epoxy and cloth are making contact, while keeping the epoxy drips out of the motortube. off the airframe and away from your shoes. Fun, huh?

The GROOVE-LOK adds incredible strength to your fincan area, with very little weight gain. It interlocks all fin cannister components, and transfers loads. MUCH STRONGER THAN A STANDARD FIN LAYUP.

Groove Lok

Handles 3 or 4 fin combinations, both in 0.062" and 0.093" G-10 Fiberglass

Groove Lok fins attached
Groove Lok top view
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