Dragon Precision 6mm Inline Spacers are manufactured to provide a precision fit with extremely low tolerances in-between your roller skate bearings. This not only allows you to fit standard 8mm 608 bearings onto your 6mm axles but also allows you to crank your axle all the way down, reducing slop and increasing longevity, durability and performance of your bearings by great amounts. Width - Overall = 0.95” (24mm) Axle Size - 6mm Precision Machined for Extremely Tight Tolerances - Between +/- 0.02 mm Construction - Iron with Zinc Coating for protection from rust. Durability - Equal to the durability of stamped steel with a more precise fitment. Perfect Fitment for Dragon Endure and Race Bearings - Designed and tested to work extremely well with our Dragon Bearing lineup. INSTALLATION: 1) Remove everything from the wheel 2) Install bearing by carefully pressing into wheel, with shield toward outside 3) flip wheel over (so outside of the wheel is laying flat on your worktop) and insert the 6mm axle spacer into the centre of the bearings axle hole. 4) Insert 2nd bearing (shield facing outward), aligning the centre of spacer with the centre of bearing, flip the wheel over and carefully push down on wheel until the bearing locks into place 5) Align wheel with wheel frame, push axle through and tighten axle head on other side 6) Repeat and go shred!