Pair of Powerpoint alignment dowels (fitted). If you require your joined baseboards to have electrical connectivity these superior, gold tipped dowels ensure just that. The inside end of each has a threaded nut to connect wire.

Pair of patternmakers alignment dowels (fitted). Professional cabinet makers choice of alignment dowel for a perfect connection every time.

Pair of small baseboard toggle catches (fitted). Once dowels are slotted together these catches clip the baseboards firmly together to ensure there is no movement.

Pair of large baseboard toggle catches (fitted). A larger version of above giving a stronger grip.