You are looking at one brand new Osborne Copper Rivet and Bur Setter Size #8. This item 170-8 is a strong forged steel, case hardened setting tool with light knurled cross sections. It sets copper rivet and burrs size 8 which are all available in our stecksstore along with other various types and sizes of rivets, screws and grommets. If you are interested in additional quantities or other items, please feel free to contact us. Please feel free to message with any questions. Thank you for looking.. Instructions: Push the rivet threw the hole then turns the material over. Place the burr or washer on the rivet, then use the rivet setter’s straight hole to drive the burr down against the material. Cut the rivet off close to the burr with side or end nippers. Do not cut off flush with the burr, but leave about 1/16 of an inch above the burr. The hole on the side of the rivet setter can be used to dislodge any waste that is weiged into the tool. Place the concave recess of the setter on the burr. Hold perpendicular and strike the end of the setter forcefully, turning to the left then right as you strike. This spreads the end of the rivet over the burr simultaneously rounding its end. A few extra blows from a soft faced mallet can be used to flatten the rivet end a bit, if desired.