Dia. : 2.2cm, 1.3cm, 0.85cm, 0.3cm Material: wood and stainless steel Package includes 4 pcs different diameter hole cutter.Sharp polished metal cutting tubes with wood hand.Consists of 4 different sizes for different hole making needs.Suitable for pottery, polymers, clay, rubber, paper clay, etc.Be used for punching, scraping and marking of clay.