This is the Du-Bro 139 1/8in Dura Collars 3.2mm (4)

High quality machined brass shaft collars that are great for wire landing gear and axle shafts. Enough stock so that threads will not strip and can be reworked for many other uses. Includes set screw and one wrench. (Wrench not included with #243 & 244)

Allen Wrench Sizes:

• 1/16" (1.5 mm) - 3/32" (2.3 mm) - 1/8" (3 mm) = .050" Wrench

Weights:

• 1/8" (3 mm) - 1.25 grams / each