Steel Rule Punches/ Cluster punch Die. 10 up - .421" diameter ( 27/ 64") .937 height, 2 pt rule with normal center bevel . Clustered with a tension clamp. For when you need high volume. Or remove clamp to use individually. Use to cut holes, rounds, or circles in most materials. Great cutting edge and durable. Hammer punch, or can use on small clicker or verticle presses. Can even tighten into chuck of drill press with edge down and press out by hand.