Although plastic worms are made in different lengths, colours, and shapes, one common factor unites them all. To attach a leader, they need to be threaded through their length.

Anglers have the option of assembling them on-site or pre-assembling them. Anglers need a long needle and the ability to thread centred in the core of the worm to maintain its form.

Unless the angler already knows the river condition, the variables of leaders’ strength, worms’ length, colours, and shapes must be matched.
As a rule, short leaders are recommended for high water and long leaders for low water. Dull colours are required for clear water, and bright colours are required for dirty water.

As a result, anglers will need a large selection unless there is a way to simplify this process.
It happens now and then that a manufacturer thinks outside the box. There are a number of them, including BNR Tackle.

Pre-hole through the centre of the worm. Ready for any leaders, allowing quick and easy assembly.