With an aluminum parallel straightedge that eliminates the need for a T-square, this portable drawing board will be perfect for classroom or on site use. It features metal brackets to hold materials in place and is highlighted by an inking edge for clean, smudge free results when using pens or pencils. Includes an inking edge for clean, smudge-free results with pens, pencils, and markers . Precision-made aluminum straightedge with rubberized grip eliminates the need for a T-square . Underwire system keeps the blade parallel no matter where it is moved . Metal side brackets accommodate material thicknesses up to 0.18 in. beneath . Twin braking system locks blade securely in any position . Non-slip rubber grip-tracks on the underside of the board allow the PXB to overhang the table edge at the perfect drawing angle bringing the work surface closer . Foldaway back legs with rubber feet are unbreakable and enable use in either the flat or angled position . Warp-free white Melamine laminated board offers a smooth drawing surface that wipes clean with a damp cloth . Comfortable carrying handle for portability . Compact for out of the way storage Alvins PXB boards provide the convenience of a studio work surface in a compact, portable unit. Each PXB is made from a smooth, warp-free white Melamine laminated board and is equipped with a convenient carrying handle, non-slip tractor feet designed to grip the table edge at the perfect drawing angle, foldaway legs, and an acrylic straightedge whose height can accommodate material thicknesses up to 0.18 in. Shipped fully assembled.