FULLY COMPATIBLE: Compatible with all Shimano SPD MTB bike pedals system. Means you can use Shimano SPD cleats on these pedals or use these cleats on Shimano MTB bike pedals. <br/>QUALITY: The pedal's cleat cage is made of a one complete piece high quality steel. The cleats precisely machined with only 0.01mm deviation compatible with SM-SH51 single direction release. This ensures very smooth click in and release. Please DO practice before riding. Watch our detailed video in the listing.<br/>SEALED BEARINGS: LSL bushing & sealed, Binding: Dual-sided Cr-Mo. Very smooth riding. <br/>ADJUSTABLE TENSION: Tension adjustable (80~140kgf.cm) .The cleats tension could be adjusted by the screw on the side of the pedal. It allows riders to achieve perfect clip in and out feelings. <br/>