Allen Key Harden – Without Ball / With Ball

The Allen-Key Harden is a hardened hexagonal hand tool designed for tightening and loosening compatible Allen/socket-head furniture fasteners. The catalogue shows both standard keys without a ball end and ball-end variants. The standard version is available in black and white finishes and is specified at 4 × 23 × 63 mm. The catalogue also lists multiple ball-end codes, although their individual sizes are not fully visible in the supplied image. Suitable for furniture assembly, hardware installation and general fastening applications.