Dutz type retaining screws
These work extremely well if one retains as follows
Diy usually work on the car jacked up so you have to go in from the sides. (outstretched arm) You have to use the original type which has a cross type screw head (phillips type) With a short type cross headed screwdriver it works fine and applying at a slight angle is still positive.The single slot head for a flat headed screwdriver has to be applied at right-angles and are positive with the car up on a Garage type Jack. Screws only require a 90 Degree turn to fasten as designed. Also, suggest you locate the actual screw to the tray first and retain to the tray by using a nylon washer which is larger than the Screw hole. If one happens to come loose (Hitting a sleeping policeman at speed !) you wont loose the retaining screw which will be still held in the tray - just push up and give the screw a 90 degree turn. The word Dutz springs to mind - spelling?
My appreciation
John
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