Truvue 4 Inch Diameter Magnetic Work Plate With Rubberized Magnetic Base: MC104 This Little Bowl Measures 4 Inches In Diameter, And Is 3/4 Inch Deep-weighs 5.7 Ounces The Base Is Magnetic And Has A Rubber Cover To Protect Your Metal Surfaces From Scratches Your Hardware And Small Tools Will Stay Attached To The Strong Magnetic Pull-even Upside Down! Great For The Auto Mechanic-also Great For Home Assembly Projects With Lots Of Small Parts Easy To Keep Track Of All The Metal Washers, Screws, Nuts, Bolts And Other Hardware