"This may well be teaching people to suck eggs but SDS Max is a totally different fitting format. It is much larger than SDS +. Drill and Chisel Bits are more difficult to find and are expensive. The smallest drill is 16mm. Purchased this item and on receipt by mail order realised the error. Product knowledge and up to date awareness is great with hindsight. Screwfix brilliant, arranged for courier to collect and return item for refund and that was after delivery to EU. Hope this helps those that are not aware."