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The Perfect-Square Corner Jig
Turn Your Quick Clamps Into Perfect 90° Corner Jigs
Turn your everyday quick-grip clamps into precision 90° corner jigs in seconds. Build flawless cabinets, drawers, and frames while skipping the cost of bulky, specialized clamping gear.
Universal Quick-Slide Fit
Custom-slotted to fit perfectly over the jaws of most standard 6-inch quick-grip clamps. Just slide them on, and you instantly have a reliable 90-degree corner fixture ready for your next build.
Flawless 90° Accuracy
Get perfectly square corners every single time. These adapters cradle your wood from the inside, locking your joints in place so nothing shifts during glue-ups or drilling. Enjoy tight, gap-free results with zero hassle.
Heavy-Duty, Non-Marring Grip
Built to handle real workshop wear and tear. These durable adapters withstand serious pressure, while their textured, anti-slip surface locks onto your workpieces securely—keeping your wood completely safe from surface damage.
| Feature | Specification |
| Product Type | 90° Corner Clamp Adapter Set (Note: External clamps not included) |
| Compatibility | Universal slot design; fits most standard 6-inch quick-grip bar clamps |
| Material | Heavy-duty reinforced composite with a textured, anti-slip finish |
| Dimensions (L x W x H) | 2.8" x 1.6" x 1.5" (7.1 x 4.1 x 3.7 cm) |
| Available Colors | Blue, Yellow, White, Grey, Orange |
| Package Contents | 4x Adapters (Provides enough coverage for two 90° corners) |
Frequently Asked Questions
Do these include the bar clamp shown in the photos?
No, this listing is for the adapter blocks only. They are designed to slide onto your own existing quick-grip style clamps.
Will these fit my specific brand of clamps?
Our adapters feature a universal slot designed to fit most standard 6-inch quick-grip bar clamps found at major hardware stores.
How many adapters do I need for a project?
You need two adapters (one pair) to clamp a single corner. This 4-pack includes enough adapters to secure two corners at the same time. If you want to clamp all four corners of a box or frame at once, you will need to purchase two sets (8 adapters total).
