3Madjustable keyboard trays help place your keyboard and mouse at proper level to increase comfort and productivity. AKT70LE has a lever adjust arm that ensures positive lock on platform height - just flip lever to right, adjust height and move lever back to lock in place. Tilt is adjusted with separate pull lever. Adjusts height to 1/2 in above mounting surface and 5-1/2 in below mounting surface. Standard all-in-one platform with wooden construction minimizes bouncing. Includes all-in-one leatherette gel wrist rest with antimicrobial product protection and Precise optical mouse pad that can be placed on right or left of keyboard. Contains 70% pre-consumer recycled content.