Kit contains the following class 8.8 hardware: two each M8x50 bolts with 10 mm hex head and two each M8 flange nuts with 12 mm hex head Replacement chain tensioner hardware for most stock applications of street and off-road motorcycles Metric class (grade) 8.8 for outstanding wear and durability Brand MOTION PRO Vendor Part Number 33-1500 Application Chain Base Color Silver Base Finish Zinc Head Type Hex Measurement System Metric Nut Type Flange Product Name Hardware Kit Type Bolt, Nut Units Pair