The crossbow bolts we sell here are for use with the crossbows that we sell. The 6.5 inch bolts are for the pistol type crossbows we sell. these bolts come in both aluminium and plastic with the aluminium type obviously being more harder wearing. The longer 16 inch bolts we sell are for the full-size crossbows we sell. we also have free shipping on all orders over £50 and price match guarantee on all our crossbow bolts.