Self-adjusting crimping tools include PZ 10 HEX, used for hex-shape crimps, and PZ 10 SQR, used for square-shape crimps. While minimizing required manual or operating force, both tools create stable electrical crimped connections that meet DIN 41641-1 requirements for solderless crimping and exceed pull-out forces stipulated by DIN 46228 1-4 and UL 486 A and B. Tools are suitable for wire-end ferrules, with or without plastic collars, for cross-section range of AWG 26–8.