The Material I'm Drilling is Spawling

Spawling is where chips of the material being drilled break and fly off the material while it is being worked. This can be dangerous because these pieces are often quite sharp and can cause bodily injury. To minimize spawling, you first need to decrease the amount of pressure that you’re using on the drill. Rotary hammer manufacturers provide a rubber cup that fits over the end of the chuck and minimize the amount of material that is able to break off and fly away. This rubber cup is called a spawl shield.