DIYLOG Corner Clamp for Woodworking, 90 Degree Corner Clamp, 4 Pack 5.5"x

The Diylog 90-Degree Corner Clamp 4-Pack is designed to hold workpieces at an exact right angle during gluing, splicing, and assembly. Woodworkers, hobbyists, and DIY builders often face uneven joints when assembling square structures. This four-piece set provides a stable mechanical reference to align corners on cabinets, picture frames, and custom furniture.

Each 5.5-inch (140mm) square is crafted from CNC-machined aluminum alloy and finished with a red anodized coating to guard against rust and corrosion. The tool features slightly chamfered edges, which prevent the metal from gouging raw lumber or scratching your hands during handling. Both metric and imperial measurement units are marked directly on the tool, allowing you to check saw blades, countertops, and wood alignment quickly.

Using the set is straightforward thanks to the included L-shaped metal screws and plastic nuts. You position the square against your workpiece, slide the screw through, and tighten the plastic nut to secure boards up to 3.5 inches (90 mm) thick. Having four matched squares allows you to clamp all four corners of a frame, drawer, birdhouse, or mailbox simultaneously, ensuring consistent alignment across the entire build.

Because the hardware uses plastic tightening nuts, builders should tighten them evenly by hand to avoid unnecessary strain on the threads. Additionally, the 3.5-inch maximum clamping capacity limits this set to medium-duty lumber and sheet goods, meaning wider stock will require alternative holding methods.

Verdict: The Diylog 4-Pack Corner Clamp set is an effective, dependable alignment aid for woodworkers assembling boxes, cabinets, and frames. It is a solid investment for hobbyists and carpenters who need precise 90-degree joints with rust-resistant aluminum durability.

• Brand: Diylog
• Material: CNC-processed aluminum alloy
• Finish: Red anodized (anti-rust and corrosion-resistant)
• Square Size: 5.5 inches (140 mm)
• Maximum Clamping Thickness: 3.5 inches (90 mm)
• Measurement Units: Metric and imperial
• Quantity: 4 pack
• Hardware Included: L-shaped metal screws, plastic nuts, plastic toolbox
• Warranty: 1 year

A great fit if you:

• Assemble picture frames, drawers, cabinets, birdhouses, or mailboxes and need square corners.
• Work with boards and stock up to 3.5 inches in thickness.
• Need a rust-resistant aluminum clamp set that includes a dedicated toolbox for neat storage.
• Prefer built-in metric and imperial markings for checking 90-degree angles on tools and lumber.

Consider something else if you:

• Work primarily with heavy timber or stock thicker than 3.5 inches (90 mm).
• Require all-metal locking hardware rather than plastic tightening nuts.

What is the maximum board thickness these clamps can hold?
The clamps support boards and materials with a maximum thickness of up to 3.5 inches (90 mm).

What materials are the clamps and hardware made from?
The clamping squares are made from CNC-processed aluminum alloy with a red anodized finish, paired with L-shaped metal screws and plastic nuts.

What comes in the package?
You get a 4-pack of 5.5-inch 90-degree positioning squares, L-shaped metal screws, plastic nuts, and a plastic toolbox for storage.

What warranty and customer support are provided?
The product includes a one-year warranty and access to a 24-hour customer service hotline for any quality issues.