The set is usually composed of 8 pieces to cover the most common fastener sizes in this range:4 Feature Detail Number of Pieces 8 pcs (Standard) Sizes Included $6 \text{mm}, 8 \text{mm}, 10 \text{mm}, 12 \text{mm}, 14 \text{mm}, 15 \text{mm}, 17 \text{mm}, 19 \text{mm}$ Missing Size Note that $7 \text{mm}, 9 \text{mm}, 11 \text{mm}, 13 \text{mm}, 16 \text{mm}$, and $18 \text{mm}$ are often excluded in this specific 8-piece set to cover the most critical sizes. Material Chrome Vanadium Steel (CR-V) Finish Chrome Plated, Fine Polished or Mirror Finish spanner
