DURABLE: This 12 piece router bit set has tungsten carbine tips that can be resharpened, ensuring smooth, accurate cuts. VERSATILE: With a 6.25mm (1/4") shank, the set includes a selection of 12 popular bit profiles. Supplied in handy wooden storage case. Contents: Bits: 1/2" core box, 1/4" cove, 1/2" dovetail, 1-1/4" 45° chamfer, 1/2" flush trim, 5/8" straight, 1/4" round over, 1/2" straight, 1/4" straight, 3/8" round over, 1/2" 90° grooving, 5/32" roman.