Pressed steel frame with six tubes that will fill most of your leathercraftneed s at a price you can afford. Ideal for lightweight leathers (up to 4-5 oz.) and occasional use. Hole sizes include 5/64", 3/32", 1/8", 9/64", 5/32", 3/16" (2mm, 2.3mm, 3.1mm, 3.5mm, 4mm, 4.8mm). Non-replaceable tubes.