Welcome to YOYO grocery store!
Specification:
Shaft Diameter: 3mm, 4mm, 5mm;6mm, 7mm, 8mm
Shape: Hexagon
Material: Brass
Total Length:18mm
Hexagonal edge to edge distance: 12mm(see picture)
Screw hole diameter: 4mm
Package Include:
Coupling x 1
Screw x 2
Wrench x 1