Quick Connect Set, Regulator to Hose, Brass, QDB31 QDB32, Fuel Gas Oxygen ORS NASCO Constructed of M 42 8 percent Constructed of M 42 8 percent cobalt high speed steel for super abrasive resistance in tough metals 135 degree split point reduces feed pressure for easier penetration without work hardening Durable rubber sided case for added impact resistance Sliding latch design provides added security Available with a variety of drill bit types and piece count configurations squeeze out and wear Available in packs of 25 (SBR25) and 100 (SBR100) Brass construction provides long service life Non interchangeable oxygen and fuel gas connectors Instant closure on reverse flow check valves Spring loaded locking mechanism responds to fingertip action and achieves a gas tight connection Double seal socket connection on second seal