Feature:1. These forstner drill bits have drilling depth of 50mm and can be used with hinge drilling machines to improve processing efficiency.2. The forstner drill bit can drill a round hole in any direction under the guidance of the round edge.3. Made of carbon steel material, with good machinability, not easy to wear after long time use.4. The kit contains 16 forstner bits of different metric sizes, which allows more accurate drilling and high chip removal efficiency.5. Can be used for various wood, plastic, plywood and other perforated materials, suitable for industrial hinge installation, etc.Specification:Item Type: Forstner Drill BitsDrilling Depth: Approx. 50mm / 2inBit Size(Metric): Approx.15mm / 0.59in16mm / 0.63in17mm / 0.67in18mm / 0.71in19mm / 0.75in20mm / 0.79in21mm / 0.83in22mm / 0.87in23mm / 0.91in24mm / 0.94in25mm / 0.98in26mm / 1.02in28mm / 1.1in30mm / 1.18in32mm / 1.26in35mm / 1.38in.Package List:16 x Forstner Drill Bits16 x Storage Box (Random Color)