Carbide Tipped, 2 Flute, 1/4 Shank Diameter Usually ships in 1 to 2 business days Comes in 1/4" shank size in attractive varnished wooden box. Contains a variety of different bits good for a whole array of woodworking jobs. A perfect gift for the home woodworker. The set contains one of each of the following: 201 1/4" Straight Bit 1003 1/2" Cove Bit 205 1/2" Straight Bit 1105 3/8" Slot Cutter Bit 208 3/4" Straight Bit 1204 3/8" Corner Round Bit 303 1/2" Flush Trim Bit 1601 5/32" Roman Ogee Bit 402 1/2" Dovetail Bit 3301 1/2" Mortising Bit 501 1/4" Panel Pilot Bit 5101 Solid Flush Trim Bit 702 1/2" V-Grooving Bit 5201 Solid 7 degree Bevel Trim Bit 902 1/2" 45 degree Chamfer Bit In case a bit doesn't come with a speed chart. You may try the following suggestion. This is merely a guideline to start, result likely varies due to the varieties of edge and material hardness: Run 24,000 rpm maximum for 1" overall diameter router bits; Run 18,000 rpm maximum for 1-1/4" overall diameter router bits; Run 16,000 rpm maximum for 2-1/4" to 2-1/2" overall diameter router bits; Run 12,000 rpm maximum for 3" to 3-1/2" overall diameter router bits;