The Kreg KHCCC 90-Degree Corner Clamp is a dedicated assembly clamp for holding two workpieces at a right angle during joinery and case assembly. This is a corner clamp designed for holding 90-degree corners and T-joints during assembly. Model Number: KHCCC. If you build boxes, drawers, cabinets, or simple shop projects, this clamp gives you a much easier way to keep parts square while your hands stay free to drive screws or other fasteners.

What makes this clamp useful on the bench is how it solves a common assembly problem: parts want to slip, twist, or open up the second you reach for the drill or driver. The V-wedge jaw layout grips the inside and outside faces of the mating pieces so they sit at a precise 90-degree angle. Kreg also designed a cutout into the clamp so you can drive a pocket-hole screw without taking the clamp off first. For pocket-hole joinery, that is the whole point. Clamp it, drive it, move on.

The Kreg KHCCC 90-Degree Corner Clamp uses Automaxx auto-adjust technology, which means you do not have to stop and reset the clamp every time material thickness changes within its working range. Just squeeze the handles and the clamp adjusts automatically to thin stock or material up to 1 inch thick. On real projects, that saves time when you bounce between drawer parts, cabinet components, and face-frame related work. The thumbwheel lets you regulate clamping pressure, so you can dial in the hold you want without overdoing it.

Build quality matters on clamps because cheap jaws flex and poor contact surfaces let assemblies walk out of square. This one uses all-metal construction with cast aluminum V and wedge clamp pads. Those pads are there for a reason: they support the work securely at the corner and help maintain alignment while you fasten. Padded ergonomic handles also make the clamp easier to squeeze repeatedly if you are doing production-style cabinet or drawer assembly.

In practical shop use, this corner clamp is not limited to Kreg pocket-hole projects. It can also hold parts for nails, wood screws, and other fastening methods as long as the work falls within the clamp's geometry and 1 inch maximum capacity. That makes it a solid general woodworking clamp for right-angle assembly, especially when you want better consistency than trying to balance parts by hand or tape them together before fastening.

This Kreg clamp is best suited for woodworkers, cabinet installers, trim and finish carpenters, and serious DIY users building storage, shop furniture, boxes, and casework. If most of your work involves flat glue-ups, this is not the clamp you reach for first. But if you regularly build square assemblies and want a faster way to hold corners accurately, the Kreg KHCCC 90-Degree Corner Clamp earns its spot fast.

Why the Kreg KHCCC 90-Degree Corner Clamp earns bench space

This is the kind of clamp that saves more frustration than it takes up in space, especially if you build boxes, drawers, or cabinets on a regular basis.

• Who it's for: Woodworkers, cabinet guys, finish carpenters, and DIY builders who need faster, more accurate right-angle assembly.
• Why it stands out: The V-wedge jaw design, auto-adjusting Automaxx mechanism, and pocket-hole screw access make it more useful than a generic clamp for corner work.
• Worth knowing: This is a purpose-built assembly clamp with a 1 inch maximum capacity, so it shines on corner and T-joint work rather than general clamping jobs.

• What joints is this clamp designed for? It is designed for 90-degree corners and T-joints.
• What is the maximum material capacity? The clamp has a maximum capacity of 1 inch.
• Do you need to readjust it for different material thicknesses? No. Automaxx auto-adjust technology automatically adapts to different material thicknesses within its working range.
• Can you drive a pocket-hole screw while the clamp is installed? Yes. The jaw cutout is designed to allow driving a pocket-hole screw without removing the clamp.