PanaVise 203 Pv Jr. Vise Head With 5/8 Inch Shaft For 300 Series Bases Easy-to-use single knob controls head movement through 3-planes: 210 degree Tilt, 360 Turn & 360 Rotation Fine/coarse adjusting knob controls jaw pressure for delicate work Grooved jaws are excellent for holding small objects and are made of reinforced thermal composite plastic Continuous heat tolerance to 350 F (177 C), intermittent heat up to 450 F (204 C) Limited Lifetime Warranty!