Sharp things - cutting tools, chips, burrs on work piece
Tangling hazard - no loose articles on the body, sleeves, gloves, or hand decorations (e.g. bracelets/rings)
Heat - cut & ground metal gets hot and can cause burns, start fires (use of water coolant)
Sound - hearing protection for louder operations
Pinching/crushing and projectile hazard if metal is not properly held (especially with the chop saw)
Brake at Disc Grinder for spin-down