Spring compass
Trammel
Wing compass
Ordinary compass
No clearance
Hardened metal
Increase in force
Excessive clearance
Releasing of seam
Compress the seam
Closing of seam
Stress relieving during seam operation
Pan head rivet
Snap head rivet
Counter sunk rivet
Conical head rivet
Dolly
Drift
Rivet set
Rivet snap
