Pneumatic shaft-locking clamps are designed for quick change applications. They provide secure clamping of sliding shaft and spindle after position adjustment of parts and units in the machinery. Spring clamping occurs when air is removed, and unclamping when air is provided. Spring clamping and pneumatic unclamping mechanism prevents the decrease of clamping force by air leakage. Body made from 5052A aluminum. Clamping shaft made from 5052A anodized aluminum. Cover made from 304 stainless steel.