The chisel tips A-4 (100N) and S-4 (1000N) are accessory attachments used for cutting tests.
Designed for puncture testing
Comes with A-4 (aluminum) force gauge for capacities under 100N
Comes with S-4 (steel) force gauge for 200N to 1000N capacity
For ZTS/ZTA-DPU series, supplied only for ranges under 500N