Heavy elastic is best used for binding bigger baits and helps to keep hook points clear for better presentation. It is more resilient to deterioration than fine elastic but can still be easily removed when rebaiting.
These heavy duty 9.5 inch long baiting needles are made from marine grade stainless steel and have a hardened point. The other end of the needle has a recess to take the point of a hook, allowing you to slide the bait straight onto the hook easily and quickly.
Light bait elastic is best used for binding smaller, more delicate baits and is very popular with many match anglers. It provides for better bait presentation and is easily removed when rebaiting.