Brand New White !/8in Hole Dual Spring Cord Lock Barrel String Toggle Slider Lot of 100 - White Dual Hole Spring Cord lock Barrel Locks. Clamps 1/16" to 1/8". (1.5mm - 3mm). These are high quality toggles. 3/4" long, 1/4" thick, 3/4" wide empty, 1/2" wide pushed all the way in.