I've mislaid/ lost a screwdriver I like using. It wasn't even parallel sided but i've used it on a lot of guns over the years.
I'll check the bin later just in case,
Those of us who like messing around with motorcycles/pushies put this sort of thing down to the activities of the Garage/Shed/House Fairies - or Gremlins, as some call them. 10mm/13mm spanners are a frequent victim. As are Philips/Pozidrive screwdrivers that turn into straights during time spent in the kitchen drawer, & VV.
Bru
Webley Mk3 x2, Falcon & Junior rifles, HW35x2, AirSporter x2, Gold Star, Meteors x2, Diana 25. SMK B19, Webley Senior, Premier, Hurricane x 2, Tempest, Dan Wesson 8", Crosman 3576, Legends PO8. Kral Puncher K.