1.material: HSS,TC or carbon steel with black finished 2.size:40mm-200mm 3.packing:blister card

1.material: HSS,TC or carbon steel with black finished2.size:40mm-200mm(metric),1-1/2"-8"(imperial)3.max speed is 900rpm with diameter up to 115mmor up to 200mm with 500 rpm

4.hex balance bar

5.packing:blister card or as your requirements

6.Fits most variable speed rotary or staionary pillar drills.etc

adjustable circle hole cutter