Discover the perfect square glass lid for your grill pans and cast - iron skillets! With external dimensions of 10.5x10.5 inches and an interior of 10.04x10.04 inches, it fits most 10.5 - inch square cookware. The lid and knob require assembly, but detailed instructions are provided. Crafted from tempered glass with a stainless - steel reinforced rim, it can handle temperature changes up to 390°F, offering superior durability and safety compared to regular glass. The steam vent hole is a great addition, preventing boil - overs and letting you watch your food cook. It's dishwasher - safe for easy cleaning. Inside the box, you'll find a 10.5 - inch square glass lid, 1 handle, and 3 cast - iron handle covers. This lid is a must - have for any kitchen, making cooking and cleaning a breeze.