3M Metal Wrist Straps feature quality Speidel™ metal expansion system for durability and comfort. Each link is covered with an insulative plastic cap. Compatible with the wrist strap ground cords 2210, 2220 and 4610/4611. All wrist strap sets include an alligator clip, which fits over the installed banana jack on the ground cord, to provide an alternative ground attachment method. Available with 4 mm snap end.