security bolt f bracket

screws

fastner

It not easy to driil out.

Dia:4.2-4.8-5.5Length:13-63mmMaterial:carbon/stainless steelFinish:zinc/yellow zinc/blue zinc/phosphatedLength:13-63Standard:G/A/I/D/JPacking:negotiableAdvantage: high quality with professional technology and resonable price

security bolt of bracket