Product description: ★ There is a superior high quality CH-60 hydraulic puncher. ★ This CH-60 hydraulic hole can be used for L-type and H-type flat copper and busbars. The end of the puncher is designed with a flat seat, smooth but does not fall, single oil return, stamped with high carbon tungsten steel, not easy to wear. ★ Can be connected to CP-700, CP-700-2A, CP-800, DYB-63A, ZCB-700A pump or electric pump (the pump is not included in our product packaging). ★ It can play 3/8" (1/2" (ф13.8mm), 5/8" (ф17.5mm), 3/4" (ф20.5mm) 4 sizes. ★ For stamping metal sheets. It is very popular in the power industry, construction, etc. Product specifications Name: CH-60 Hydraulic Punch Punching pressure: 310KN / 31T Neck width: 95 mm / 3.74 inches Aperture (4 pairs): 1/2" (1.