The Drill Doctor DD500X is a professional-level drill bit sharpener that is ideal for sharpening a full range of bits, including split points and the 135 bits used in drilling hardened metals. Sharpens split-point bits and creates split-points from standard bits.Bit Sizes :3/32 to 1/2 SAE. Angle Sharpening :118, 135 deg.Carbide-Tip Bits :Yes .High Speed Steel Bits: Yes .Masonry Bits: Yes Split Point Bits: Yes. Titanium-coated Bits: Yes. Case Included: Yes. Easy front-loading chuck.Features Quick Change diamond sharpening wheel no tools needed.Simplified alignment and sharpening procedures.E-Z Align System assures correct sharpening alignment.Variable Alignment lets you adjust chisel and relief angles.Replaceable diamond sharpening wheel.Model Model# DD500X.