1/4, 5/16 or 3/8 oz... Has many uses as well, but most common is for smaller swim baits. Pro tip...A small dab of super glue on the bait keeper before pushing bait onto jig head will ensure your bait stays on and lasts much longer. Some even use for tube head weight as it makes for an erratic fall. Grubs swim very true with this head as well. Made with 4/0 LIL Nasty hook. With much exerimentation over the last couple years, this hook proves to keep the bass/fish pinned and not be thrown as easily as others and are super sharp