Thank you for viewing. This is a set of two Musashi Twin Cutters: one φ10 and one φ12. These cutters can create holes in aluminum, iron, stainless steel, and resin without burrs on the back side. Please refer to the manufacturer's website for details. These double-ended cutters are very economical. On Rakuten, the φ10 is ¥2739 and the φ12 is ¥3513 (excluding shipping). The packaging is as shown in the image, but the contents are new and unused. This is a great deal for those who can use them! Thank you for your consideration. Please read my profile. #drill #cuttingtool #cuttingtools #endmill #drillingmachine #millingmachine #lathe #drillchuck #metalworking #holemaking #tools #cutting #polishing #grinding