Professional 90 Degree Corner Clamp Set, CNC Aluminum Right Angle Clamp 140mm/5.5",

The Ecarke Professional 90 Degree Corner Clamp Set is designed to square up joints for woodworking and fabrication projects. Machined from aluminum alloy with a blue anodized finish, each 140mm square provides an alignment accuracy within plus or minus 0.1 degree. It helps woodworkers, metalworkers, and DIY builders align right angles securely without shifting during assembly.

Using the set is straightforward: place the square against your workpiece, align your material, and tighten it down with the included L-shaped bolts and plastic knobs. The squares feature chamfered edges to prevent marring on wood surfaces while keeping your hands safe during setup. Integrated dual metric and imperial scales along the edges also let you check dimensions quickly without grabbing a separate ruler.

With a maximum clamping capacity of 90mm (3.54 inches), this kit handles a variety of builds including cabinets, drawer boxes, chair frames, and welding jigs. The hardware includes 304 stainless steel fasteners to resist corrosion in damp shop environments, and everything packs neatly into an included storage case alongside the four positioning squares, fixing blocks, L-bolts, and M8 nuts.

As for trade-offs, the clamp capacity is strictly limited to stock under 90mm thick, so it will not accommodate extra-wide timbers or heavy structural beams. The tightening knobs are plastic rather than metal, which requires reasonable care against over-torquing during heavy clamping tasks.

Verdict: This corner clamp kit is an excellent choice for DIYers and woodworkers building cabinets, picture frames, drawers, or light metal projects. If you need a complete, precise 4-piece squaring system with its own storage case, this set delivers solid value.

• Square Size: 140mm (5.5 inches)
• Clamping Capacity: Up to 90mm (3.54 inches)
• Material: CNC-machined aluminum alloy with blue anodized finish
• Fasteners: 304 stainless steel with M8 nuts
• Accuracy: Plus or minus 0.1 degree
• Scale Types: Metric and Imperial
• Included Pieces: 4 positioning squares, fixing blocks, L-bolts, M8 nuts, storage case

A great fit if you:

• Build drawers, cabinets, boxes, or chair frames requiring precise 90-degree corners
• Need dual metric and imperial reference scales right on your clamping squares
• Work in humid workshop environments and need corrosion-resistant fasteners
• Want a full 4-clamp setup that stores neatly in an included case

Consider something else if you:

• Regularly join materials thicker than 90mm (3.54 inches)
• Prefer all-metal clamping knobs over plastic components

What is the maximum board thickness these clamps can hold?
The clamps accommodate workpieces and boards up to 90mm (3.54 inches) in thickness.

What items come in the kit?
The set includes four 140mm positioning squares, fixing blocks, L-bolts, M8 nuts, and a protective storage case.

Can these clamps be used for projects other than woodworking?
Yes, they are designed for woodworking projects like cabinets and drawers, as well as welding jigs and metal bracketing.