The Metal Shake N Blast Canister is perfect for blasting small parts without worry of losing any components. Please Note: The Shake N Blast Canister is designed for parts roughly 0.500 inch cube down to a 0.087 inch cube in size. The length of time to blast will be determined by size of the part being blasted, quantity of parts being blasted, type of blast media, and air PSI. It is best to shake both up and down and back and forth. Also, the loose fit of the cap is necessary to prevent the abrasive grains buildup and locking the cap in place.