Rob Allen Impact Spears are designed to fit all Euro gun mechanisms. Engineered from ultra tough oil-quenched Carbon alloy spring steel thet are tempered to 2100Mpa. Tri-cut tips ensure excellent penetration while the rocktip is designed for close quater reef fish hunting. 270 degree polished wishbone notches and polished line holes (available in both single & double notch configurations) ensure minimum wear. Each spear is mechanically decoiled from the heat treated bulk roll and hand straightened and quality checked before machining. Quatro Phase coating ensures corrosion protection four to five times better than conventional Electrogalvanising.