1/2", Forstner Bit, Designed For Perfectly Smooth, Flat Bottomed & Splinter Free Holes, Even In End Grain & Through Knots, Ideal For Drilling Decorative Holes For Fine Woodworking & Hinge Boring, Chrome Steel Alloy Construction Allows The Bits To Withstand High Temperatures During Drilling, Reducing The Risk Of Burning, Brad Point Centers Bit For Easy Positioning Of Hole, Suitable For Portable Drills Or Stationary Machines.