Here’s 3 Of The Most-used Chuck Sizes Complete In A Set. Sizes Include 1mm, 2mm, And 3mm. Pin Lengths: 7/8", And The Vise: 2 3/8". This Will Make A Great Addition To Your Tool Box Or Work Bench.* 3 piece chuck set - sizes include 1mm, 2mm and 3mm - 3 popular sizes * Grip on vise allows you to rotate and change the chucks easily without too much effort * Black oxidised steel - 2-3/8 inches long vise - chucks are 7/8 inches long * Vise to hold small drill bits - for drilling insertion hole - jewelry work - very diverse tool * A very high quality piece of equipment that is necessary for many tasks