Specifical step design, one drill for many sizes, very convenient.
Durable.
Cutting material: iron sheet, aluminum, insulation board, PVC plate wood thickness in 4mm.The hole with a drill can play a variety of.
Type:step drill
Material:High speed steel
colour:black
Package Contents:
1 * 4-12mm drill
1 * 4-20mm drill
1 * 4-32mm drill
1 * Storage Bag