https://www.ebay.co.uk/itm/324350466079
Primarily for uPVC, but the arrow shaped bit could likely be stuffed in that slot.
And @umop3pisdn Ta! will have a look.
@Howard started
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https://www.ebay.co.uk/itm/324350466079
Primarily for uPVC, but the arrow shaped bit could likely be stuffed in that slot.