Upgrade your pneumatic toolkit with our 2-Pack Industrial Air Hose Coupler set. This kit includes two heavy-duty 1/4 inch NPT female quick connect couplers designed for professional-grade performance. Each coupler features precision 4-ball bearing locking mechanism that ensures secure, leak-free connections even under high pressure conditions up to 300 PSI. Crafted from high-quality alloy steel, these air fittings offer exceptional corrosion resistance and durability for long-lasting service life. The deeply knurled sleeve provides superior grip and easy operation, allowing for quick connect and disconnect operations even while wearing work gloves. These industrial-grade couplers are universally compatible with all M-style (D-type) air hose connectors and plugs. Ideal for various applications including automotive repair shops, professional jobsites, and home garage use. Perfectly compatible with air compressors, pneumatic tools, nail guns, blow guns, pressure washers, and most industrial equipment. Ensure reliable performance and secure connections for all your pneumatic needs with these essential air hose fittings.