1、EASY INSTALLATION: GCr15 No. 45 carbon steel shaft bracket with pre drilling for easy installation and no need for maintenance 2、STABLE COMBINATION: The perfect combination of the main shaft bearing guide rail and GCr15 No. 45 carbon steel bracket stabilize the original guide rail 3、ACCURATE INDUSTRIAL GRADE: Linear bearing slide set adopt industrial standard SBR block with high accuracy linear bearing inside 4、WIDE APPLICATION: linear ball bearing group is widely used in the installation of various machinery, such as engraving machine, woodworking machinery, printing machinery, machinery and so on 5、DURABLE STEEL: Linear motion bearing kit is made of GCr15 No. 45 carbon steel, chrome plated surface treatment, beautiful and rustproof, hardness up to HRC62, more durable