Our drill bit sharpening attachment jig is great for sharpening jobber length drill bits. This method is more effective than the pencil type sharpeners on the market. Features include: Does drill bits from 1/8” to 3/4” in standard sizes and 3 MM to 19 MM, letters A to Z, numbers 1 thru 30 Pre-set angles at 49, 59, 68 & 88 degrees Fine adjustment wheels Made of metal for long life and durability Instructions included Measures approximately 7” tall Base can be mounted near your grinder