uxcell 4 Pcs Square Steel Key Stock, 1/2" x 1/2" x 12" Cold-Drawn 45# Steel Bars Precision Key Stock for Gearbox Coupling, Silver Tone

uxcell 4 Pcs Square Steel Key Stock, 1/2" x 1/2" x 12" Cold-Drawn 45# Steel Bars Precision Key Stock for Gearbox Coupling, Silver Tone