This is a pack of two Team Associated 3x27.5mm V2 Ti-Nitride Screw Mount Shock Shafts. These shafts use a screw to hold the piston in place and a Ti-Nitride coating for long life. These are used with the ASC91577 buggy rear shock bodies, as well as with the ASC91578 truck front shock bodies. NOTE: These screw-mounted shafts are not compatible with E-clip pistons.