Promax Direct Mount 42t Chainring Black MFPN=4600 62236 Specialty high performance assembly grease Specialty high performance assembly grease that excels in a multitude of heavy duty and light duty applications from building engines to building chassis 8 Drop Bend Style Compact Cable Routing Internal Material Aluminum Width Measurement Center Width 40 Defined Color Black Clip on Compatible Yes Designed for use with Promax HF 3 and CK 1 cranksets but will also fit other cranks that utilize SRAM 3 Bolt mount chainrings Machined from high end aluminum Promax Direct Mount chainrings are made to be lightweight yet extremely durable to handle the torque and stress of modern BMX racing and other single ring applications