Material: stainless steel, this product is very durable, with perfect outside corners and easy inside corners. Package Included: 2 Inside + Outside Corner Trowel: 40mm/1.57in x 145mm/5.7in; inside corner: 40mm/1.57in x 145mm/5.7in. An inside corner trowel for finishing drywall and plaster, the perfect tool for tackling plaster corners, delivering the perfect 90 degree angle with minimal effort. Perfect 90 Corner Sculpting: The inside corner trowel is your weapon for corner plastering, allowing you to easily achieve a perfect 90 turn in the corner. Finish small nooks or ledges around windows, doors and aesthetic grooves. The edges of the product are a little sharp. Use sandpaper or grinding wheel before use to avoid hurting your hands.