Butterfly  punches are made of die cutting blade knife, which has three class hardness: body hardness HV280; core hardness HV380; edge hardness HV600. Hollow punches are used for spacers,plastic,fibre and so on. Because of the superior performance, the cutting piece can exce-ed to 800000pcs.

Height: 23.80mm

Cut Diameter:  from 24--32x4mm、24--32x5mm、24--32x6mm、24--32x7mm

Outside dia = cutting  dia +0.7mm