The product is described by the manufacturer WIHA as a spare part for precise installation and removal of plus/minus screws

as stated in the product text

WP 65 (specified on product page)

Som værksteds- og produktionsmiddel er det altså en rengøringsvæske til den daglige drift

the 05059337001 is specified with the following key features

Bit serie 4 unbrako 1/4": SW4,0x50mm MIL4211101401 The product is described byProduct Category: Bit (840 4 Z Hex Plus) The Wera 05059610001 is an 840 4 Z Hex Plus bit with a 4. 0 mm tip and a 50 mm blade length. This product is designed for internal hexagon screws and is listed in WERA's official product list for the 840 4 Z bits series. What the product is and does The bit is a Z (zhhart tough) Hex Plus variant, which in the manufacturer's documentation denotes a hard and universal construction variant. The Hex Plus geometry