Hole punching tool accessories Tension screw Tension screws as accessories for the hole-punch tools. Variably available with or without ball bearing. Tension screw Hydraulic tension screw for higher loads Accessories for hole punches. Required as a connecting part between the die and the stamp. For operation via hydraulic punch Show Products Tension screw Tension screw with ball bearing Accessories for hole punches. Required as a connecting part between the die and the stamp. Show Products Tension screw Hydraulic tension screw Accessories for hole punches. Required as a connecting part between the die and the stamp. For operation via hydraulic punch Show Products