Buy Speed Vises Speed Vise Product Features Dimensions:   Opening: 0” to max of 8-1/2”   Outside: 17” by 5-1/8”   Jaws: 2-9/16” by 3-1/4” Instant slip to clamping position and return, from 0” to 8-1/2” Carburized steel shaft and insert for superior strength and loading Both steel and plastic jaws are included Copper coated to reduce welding slag Integrated inset pipe jaw Portable design to fit in the top of most tool boxes 5 clamp or bolt down feet for securing permanently or temporarily to work benches Strong, ductile iron body with machined surfaces