Particularly suitable for applications in plumbing, heating and air conditioning 300 mm long rigid blade Bit holder with very slim design for work in confined spaces Secure bit holding feature due to locking mechanism. With strong permanent magnet. Compact stainless steel holder for bits with 1/4″- external hexagon drive as per DIN 3126, ISO 1173 Form C 6.3 and E 6,3, Manufacturer: Wera