CNC machined from aluminum billet T6063-T6 with hard anodized finish.Designed as a replacement preload adjuster for motorcycle front fork suspension.Features 39mm thread size.Installs directly without requiring fork removal or fork oil draining.Includes one pair of bolts.Available in black and silver.Compatible with FXD, FXDL, FXDC (1991–2005), FXR (1987–1994), FXLR (1987–1994), FXRT Sport (1987–1992), XL883N Iron 883 (2009–2015), XL1200X Forty Eight (2010–2015), and XL1200L (1988–2016).Not compatible with FXDX, FXDXT, FXDWG (2000–2005), XL883R (2002), or XL1200S.