The bit holder is intended for use with T-handle torque screwdrivers and functions as an extension/holder for bits during controlled tightening

35 mm (1/4 in) in diameter

and warehouses

3 (1/4") drive

These are the directly stated applications from the manufacturer's documentation

Skalpel Unit(s):Packet The bit holder is intendedLightweight Precision Knife XN100 What the product is The XN100 is a lightweight precision knife from Weller Xcelite. The knife is designed for precise cutting of paper, soft and light materials, and wood, and comes with a fine tip and an overall length of 147. 6 mm (5 13 16 in). Function and Use The XN100 is used for tasks requiring detailed, controlled cuts in materials of low to moderate thickness. The knife's fine tip supports precision work, and