Product Description Extended Dovetail Jaws, square hole inside for Viper3 Chuck. Set of 4 optional jaws for our Viper3 scroll chuck. These extended pin jaws are dovetailed on the outside. The internal edge is flat, forming a square when closed, perfect for gripping square shaped spigots. The jaws project 56mm from the base plate. Expands from 23mm to 58mm Contracts from 44mm to 9mm
