perfect for professional use to clamped to boxes, picture frames, shelf cabinets and outside corners.etc, to assist with squirting during glue up. STURDY AND USEFUL - It is very handy in many applications with this woodworking tool and use for a right angle fit and help to assemble wood decorative boxes and other projects. HIGH QUALITY - Made from high quality plastic that insures optimal durability and usability, it makes the positioning squares easy to clamp and strong enough to not flex. EASY TO USE - Both the inside and outside edges of these Positioning Squares tools can as exacting measuring guides Key Features: 8 clamp-on machinist squares, 4 in. Square up perfect corners in your woodworking projects perfect for gluing and assembling your boxes, drawers, frames, furniture, cabinets, dollhouses, etc. Embossed gradation (in inches and millimeters) on both the inside and outside edges of each square Comes in handy 8-pack Both the inside and outside edges of these multi-tasking squares can as exacting measuring guides Specification Material: Plastic color: red Size: 4 x 4 x 0.63 x 0.95 inch/10 x 10 x 1.6 x 2.4cm Weight:126g Package Contents: 8 x Positioning Squares Tools Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.