From Marcrist
The Marcrist Hilti DD100 DCM1 To 1/2'' BSP (F) Adaptor is a small hardened adaptor which allows the user to switch quickly and efficiently between threads on site. Durability was key to Marcrist when designing the adaptor, as a result the product is both corrosion and rust resistant giving it a longer life time.Features & Benefits Vibrations minimised Precision engineered Corrosion and rust resistant For perfectly concentric running Hardened steel for long life