- CNC machined from ½ thick aircraft quality 6061 heat-treated aluminum. The thicker material and large beveled edges provide added comfort. 

- The large hole in the wrench is internally D-Shaped to conveniently hold the small end of the piston from rotating during cleaning 

- Finished with a baked-on Non-Mar Mil Spec coating (same spec used by the military). This finish is .002 - .004 thick and very durable, plus, the wrench won't damage or mark your gas cylinder.