3.5mm drill and TCT countersink bit.I have been using these bits personally in my cabinetmaking business for the past year and they have outperformed other high quality bits that are 3 times the price. Take your cabinet assembly to the next level with these TCT 3.5mm drill bits.These are perfect for drilling into MDF with 8g screws to avoid splitting also perfect for Melamine cabinet assembly.They have a 10mm countersink chamfer and a 8mm shaft.The 8mm shaft allows you to fit it into festool centrotec bits 8mm or 10mm drill bits that are sold separately and not include with this bit.Link here to festool 8mm centrotec drill bithttps://www.festool.com.au/products/accessories-and-consumables/drilling-fastening/drill/drill-bits/high-speed-steel-twist-drill-bits/8mm-hss-drill-bit-centrotec-holder-set_495308495308 8 mm HSS Drill Bit & Centrotec Holder SetAll Items will be sent via courier or Australia Post and should ship within 3 business days.If you have any question or any problems with your order please don't hesitate to contact us and we will resolve the issue ASAPHappy ShoppingWaterfall Joinery Accessories.