Several reviewers have mentioned this, but for me the biggest benefit is how quiet this thing is! I've tested all the weights and found the 18 oz to be perfect for regular chiselling. You can't tell from the pictures here, but the 12 and 18 oz are the same size, while the 20 and 30 oz have a thicker urethane band around the head, making them taller and heavier. The weight difference between 12/18 and 20/30 is due to the extra metal plugs in the core of the head. For me the extra weight of theβ¦