SummaryHello! This is a mini handle for artsy and crafty folks, will fit Swan-Morton no.4 fitment blades, shown in photo is the no.26 blade... https://www.youtube.com/user/ScalpelsandBlades I think these are widely available on ebay UK... Please be careful inserting the blade, if possible print two so one can be used to safely push in the blade, it's designed to have a snug fit.Print SettingsRafts: NoSupports: NoResolution: less than 0.15mmInfill: 100%