Check the listing for details. 20PCS Woodworking Milling Bits Set, HSS Engraving Bits, Woodworking Router Bits. Color: Gold, Silver, Condition: New. Listed at 5.61 USD. Specifications Color: Gold, Silver Material: Hss Process: Titanium Plating Number of Pieces: 20 Blade Head Size(D*H): 6*8.8mm/0.236*0.346in, 6*7.3mm/0.236*0.287in, 6*9.3mm/0.236*0.366in, 7.6*10.5mm/0.299*0.413in, 8*7.5mm/0.315*0.295in, 8*10mm/0.315*0.394in, 6*8mm/0.236*0.315in, 5*11mm/0.197*0.43in, 8*8mm/0.315*0.315in, 5*10mm/0.197*0.394in, 2*7mm/0.079*0.276in, 2*3mm/0.079*0.118in, 2*6mm/0.079*0.236in, 2*2mm/0.079*0.079in(2pcs) Blade Head Diameter: 4.8mm/0.189in, 4mm/0.157in, 5mm/0.197in, 4.9mm/0.193in, 3mm/0.118 in Each Blade Length: 39mm/1.53in Shank Diameter: 3mm/1/8 in Package Size: 8*6*0.5cm/3.15*2.36*0.2in Gross Weight: 0.06kg/0.13 Lbs Package Included 20*Woodworking Milling Bits Set.