Remember when you powered through metal with ease? The WEN 8-Piece Milling Collet Set helps make easy work out of a range of metals by keeping your bits tightly secured during operation. This set of imperial collets ranges in size from 1/8 to 5/8 of an inch. All you need is a set of compatible drilling bits, and you're ready to mill. Compatible with the WEN 33013 Metal Milling Machine and the WEN 33108A 8-Piece 2-Flute HSS End Mill Set for Milling Machines. Sizes include one 1/8-inch, one 3/16-inch, one 1/4 inch, one 5/16-inch, one 3/8-inch, one 1/2-inch, one 9/16-inch, and one 5/8-inch collet. Remember when you could take on the toughest metals? Remember WEN.