Precision hand seamer is drop forged from tool steel so they will not break as some of the cheaper types. The faces are machined perfectly smooth, and aligned to be exactly parallel along the edges. All of which makes for nice flat seams without any signs of pinching or warping. Extra wide 3-3/8" jaws lets you work longer seams faster, but they're still narrow enough to conveniently work the smaller areas. 6" long handles are covered with thick vinyl grip to provide maximum leverage without any discomfort.