Extended Spider & Swan Rests
The Extended Spider and The Swan serve similar purposes. Both enable players to reach a cue ball which is the other side of a group of balls - for instance the pack of reds in Snooker. In such cases, even a spider will not adequately reach the cue ball and so either an Extended Spider or a Swan is the requisite tool.
The difference in functionality between the two is subtle but the Swan will give a greater height so is useful where the cue ball is a distance away and it is desirable to approach it at a steep angle. The extended spider has a slightly greater reach and is sometimes found on a longer shaft - see the Long Spider section below.