Features: : Three edge chamfering Material: HSS Quantity: 6pcs Shank: Round handle Sizes: 6.3mm/ 8.3mm /10.4mm / 12.4mm / 16.5mm / 20.5mm Specification: head diameter x shank diameter x length 6.3MM: 6.3mm x 5mm x 37mm 8.3MM: 8.3mm x 6mm x 40mm 10.4MM: 10.4mm x 6mm x 39mm 12.4MM: 12.4mm x 10mm x 46mm 16.5MM: 16.5mm x 10mm x 47mm 20.5MM: 20.mm x 10mm x 47mm color: Silver Note: Applicable to workpieces with hardness below 25hrc, such as carbon steel, thin iron plate, insulating board, PVC board, wood board, etc., not suitable for stainless steel Package Contents: 6 x Milling Cutter Countersink Drill Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.