Abstract: An arrow system for reducing a kill time of a prey features an arrow shaft and an arrowhead. An arrowhead first end features a terminating point for piercing and an arrowhead second end features an arrowhead threaded rod for attaching to a shaft first end. The system features a tail component having a tail second end with a nock for interfacing with a bow string. A tail first end features a tail threaded rod for attaching to a shaft second end. A plurality of fletchings, each having a sharp edge, is located on an outer periphery of the tail component. Each fletching features a centrally located aperture. Each fletching outer periphery features a shape of a scalene triangle. Each fletching aperture features a shape of a similar triangle with respect to the scalene-triangle-shaped fletching outer periphery.

Abstract: A bolt-arrow system having a shaft with a first end and a second end, an arrowhead component having a pointed end and a shaft end, the shaft end removably engages the first end of the shaft, a fletch head having a shaft end and a back end, the shaft end removably engages the second end of the shaft, and a plurality of fletchings extending outwardly from the fletch head, the fletchings each comprise a sharp edge.

Abstract: A mine roof bolt for use with a cable comprises a barrel having a first end and a second end, the second end having a rounded surface, a bore extending through the barrel between the first end and the second end and including a tapered portion, the bore sized to receive the cable, a pair of wedges sized for placement in the tapered portion of the bore and adapted to frictionally engage a cable disposed in the tapered portion of the bore, a recess defined in the first end of the barrel, and a driving nut sized for insertion in the recess and adapted for engagement by a driving tool.

Abstract: A mine roof bolt for use with a cable comprises a barrel having a first end and a second end, the second and having a rounded surface, a bore extending through the barrel between the first end and the second end and including a tapered portion, the bore sized to receive the cable, a pair of wedges sized for placement in the tapered portion of the bore and adapted to frictionally engage a cable disposed in the tapered portion of the bore, a recess defined in the first end of the barrel, and a driving nut sized for insertion in the recess and adapted for engagement by a driving tool.