Stanley Proseries Comfort Grip Inside Corner Taping Tool Drywall Wallboard Tools with 4" Stainless Steel Sidewalls This Stanley ProSeries Comfort Grip Inside Corner Taping Tool has 4 inch wide sidewalls. Blade is formed from one piece of highly flexible stainless steel. Advanced handle design provides comfort and a slip-resistant grip for better control. 103 degree blade angle flexes to 90 degree for perfect tight corners. From Stanley, a brand you trust for quality and durability.