Set of 12 C.S. Osborne Copper Rivets & Burrs.CS Osborne 3/4" Long Solid Copper Rivets and Burrs. Heavy duty, rust proof permanent fasteners. They are easily set with Osborne No.170-8 rivet setter. Made in USA.Size Number : 14Diameter under head (inches) : 0.102Overall length : 3/4"Tool to be use : Osborne No. 169-8You will receive 12 each of rivets and burrsInstructions : Push the rivet through the hole then turn the material over. Place burr on rivet, then use the rivet setting tool’s straight hole to drive the burr down tight 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 wedged into the tool. Place the concave recess of setter on the burr. Hold perpendicular and strike the tool 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 the # 57 riveting hammer can be used to flatten the rivet end a bit, if desired. (Setter and Hammer Not included)C.S. Osborne & Co. is a manufacturer of specialized hand tools designed exclusively for upholsterers, auto trimmers, awning and canvas workers, furniture makers and other professionals in related trades. For generations, the family run business has always taken great pride in engineering the highest quality tools and offering our products both here in the United States and abroad. C.S. Osborne produces the most extensive line of custom tools available -and we guarantee that our tools will deliver excellent quality and superior performance.