KaShDa Set of 4 Silver Plated Necklace Extenders with Lobster Claw Clasps 2", 4", 6" & 8" Handy set of 3 adjustable length extenders: You will receive 1 each 2", 4", 6" and 8" extenders. 3.7MM Silver Plated Brass Core Curb Chain with links that will accept clasps up to 3MM wide 12MM (1/2") Silver Plated Brass Core Superior Quality Lobster Claw Clasps. Easy to move from one piece of jewelry to another. The stated length includes the clasp. Use with your chunky necklaces, these are strong enough for jewelry pieces weighing up to 15 ounces.