Contents: Quick release quick release (A), 2 mounting bolts (B), 8mm Allen key (C), 2.7mm non-drive spacer (D), 2 washers for the mounting bolts (E F), Cassette spacer (G), 12mm drive side thru-axle adapter (H), Quick release adapter for 135mm axles (I), 12mm non-drive side thru-axle adapter for 142mm axles (J), 12mm non-drive side thru-axle adapter for 148mm axles (K).