Power form compact aaa set for fine mechanical applications. Suitable for the recording of bits with 4 mm half moon drive (Wera Series 9) and bits with 4 mm Wera HIOS-drive (series 21). Electrical Surface resistance< 10^9 ohm for safe protection against electrostatic energy. Manufactured according to DIN EN 61340-5-1. Compact handle/blade system for lightning-fast blade exchange. Kraftform Micro handle with rotating cap and quick-twist zone for lightning fast speed, no more time-consuming fumbling is no longer necessary. Power Zone with built-in soft zones for transfer of high release and tightening torques. Precision zone directly above the blade for the correct angle for adjustment work. Bits for hand and machine-operated screw connections. Lightning-fast Bit-Fixierung: bit in the Recording slide, automatic locking, secure fit. The interchange of sleeve simply forwards and bit. Free-running actuating sleeve for simple navigation of the tool during the process.