This Imperial Kit #1001-05 comprises a single handle onto which screw a series of nine interchangeable punches. The Handle and punches are fully heat treated and chemically blacked. The handle should be struck with a hammer or mallet onto a wooden block. The spring loaded plunger in the handle enables holes to be accurately centred and serves to eject the slug. This imperial set contains: 1/4″, 5/16″, 3/8″, 7/16″, 1/2″, 5/8″, 3/4″, 7/8″ and 1″ sizes Made in England