Check the listing for details. 9 Jack hammer Wasp 75 Grain Replacement Blades. Condition: New. Listed at 15.00 USD. The 9 Jackhammer Wasp 75 Grain Replacement Blades are designed specifically for use with compound bows in bow hunting. These replacement blades, manufactured by Wasp, are compatible with the Jackhammer style arrowhead and offer a grain weight of 75 grains. Ideal for outdoor sports enthusiasts looking to replace or upgrade their arrowheads, these blades ensure reliable and accurate performance in the field.