Bosch OSC214C 1-Inch x 2-Inch Caulk Knife Blade Appplication-Removal of adhesive and caulk from tubs, showers, sinks or faucets Award-winning pro interface: Oscillating Interface System (OIS) Laser-etched depth gauge for accurate capacity measurements Multiple position settings for optimal versatility (30-degree increments) 2-1/4" caulk knife Depth gauge for accurate measurement Laser etched depth gage for accurate capacity measurements Multiple position settings for optimal versatility (30 Degree increments) 2-1/4-Inch knife