DIMENSIONS AND PACKAGE: 4 pieces 6-inch 90-degree positioning squares. Material: The set is made of high-strength engineering plastic, which is very hard, durable, and easy to carry. Perfect 90° Corners: Easily create accurate 90-degree right-angle woodwork, essential for ensuring a balanced project result. Clamp the blocks quickly and easily. Multi-angle Scales: There are 45-degree and 22.5-degree scales near the center of the right-angle goniometer, which is convenient for measuring angles. Application: Suitable for welding wood, metal at right angles and 90 degrees, etc. Suitable for gluing and joining boxes, drawers, frames, furniture, cabinets, etc. Some woodworkers even find it useful to incorporate them into clamps and fixtures.