This video is about Socket Fusion - Jig Assisted
Jigs are mobile and are designed for job site fusion connections of 2" to 4" (63mm to 125mm). They can be freestanding or fastened to available surfaces and used in a pre-fab station. These units consist of a sliding carriage with a light metal body, a built-in or removable heating plate, clamping jaws and mounting clamp. These types of fusion machines are ideal for vertical, overhead and tight space installations.
Note: Jig used in the video is Ritmo Prisma Jig