Isolate pneumatic energy without the expense of installing in-line lockout valves. Our pneumatic lockout is applied to the male fitting, isolating equipment from all compressed air sources. Accommodates the majority of 6.35 mm (1/4 in), 9.52 mm (3/8 in) and 12.7 mm (1/2 in) male fittings. The center of the lockout allows for storage on the air hose. Use with our 38 mm brass bodied padlocks with 6.3 mm diameter shackles.