Swann Morton 9105 ACM No 1 Knife. Fits blade no's 7, 10, 11, 16 & 17. The ACM range is designed for Arts, Crafts and Modellers. Very good quality solid metal handle with an interchangeable clamp for a wide range of different shaped blades. The No 1 is about the same size as a pencil so comfortable to use. Comes with one no 11 blade. Not to be sold to anyone under the age of 18..