This is a Kukko K-30-10+S univeral 3 jaw external and internal jaw puller. This puller has a maximum capacity of 3 tons. The maximum spread is 4 3/4" and maximum reach is 3 7/8". This is a great puller for removing bearings, gears, discs, bushings, and seals in hard to reach areas. This is a high quality puller made in Germany.