FINAL All-Weather BLOX contains the powerful active ingredient, Brodifacoum, our strongest, single-feeding anticoagulant. FINAL is effective in controlling both rats and mice but works especially well to clean out persistent mouse infestations. FINAL All-Weather BLOX, with its distinctive cog-like shape, is made with more food-grade, inert ingredients for a flavor rats and mice can't resist. The bait of choice in the pest control industry, Bell's proprietary All-Weather BLOX are manufactured from Bell's unique extrusion process that yields a hard, multiple-edged bait with the palatability of a meal bait and the weatherability of a paraffinized bait. This highly weatherable block bait easily fits in tight baiting places. A hole in the center of this 20g Blox lets PMPs place it on bait securing rods in Bell's tamper-resistant bait stations, or nail/wire it in place. With BLOX, you'll get effective rodent acceptance and control. The multiple edges appeal to a rodent's desire to gnaw. BLOX work well in any condition -- wet or dry, indoors or out. Ready-to-use FINAL All-Weather BLOX complements Bell's outstanding line of rodent baits, offering PMPs another tool to control rats and mice.