Thank you for viewing! This is a size #4, thick shaft type hook. (Also available in the standard #4 type.) These are high-quality, high-strength triple hooks (treble hooks) made overseas (China), and come in a great value pack of 30. (Different sizes can be shipped in units of 10, such as 20 of #4 and 10 of #6.) ・Very affordable at 38.3 yen per hook. (Domestic brands cost 100-140 yen per hook.) ・The hook points are very sharp and easily catch on your fingernail. ・Rust-resistant tin coating makes them resistant to rust in saltwater. ・Center balance eye. ・The hook shape is a Sproat bend, as shown in the photo. Generally, this is stronger than a round bend. The slightly inward-facing hook point makes it less likely to lose fish even with a single hook, and it has proven to be strong enough for actual sea bass fishing. [Product Contents] ● #4 Thick Shaft Triple Hooks - 30 pieces ● Saltwater OK (After use, rinse thoroughly with water and dry completely.) ● Hook size: Please refer to the image. ● Weight: 1.17g (average value) (Reference: Cultiva STX-58 is 0.91g (#3 is 1.14g), Gamakatsu RB-H is 1.1g.) Uses: For replacing hooks on lures with dull points or hooks that have been stretched. For replacing hooks when purchasing used lures. All items are visually inspected. These are high-quality, high-strength products selected from multiple manufacturers, but please refrain from purchasing if you are looking for the perfection of top domestic brands (Gamakatsu, Owner, etc.). The sizes available, in order from largest to smallest, are: #1/0 Thick Shaft, #1 Thick Shaft, #2 Thick Shaft, #2, #4 Thick Shaft, #4, #6, #8, #10, #12 (The #4 and #12 sizes are slightly heavier.) If you purchase other sizes or other products at the same time, we can combine shipping and offer a discount on shipping. Please let us know in the comments section and we will create a dedicated listing for you. *The rust resistance is slightly inferior compared to top domestic brands. (I personally don't mind and continue to use them as long as the hook points are sharp (^-^;)) Thank you. Fishing type/fish species... Bass, sea bass, cherry salmon, jigging, trout, others Lures... Kattobi Bou 130BR, Trident 115S, Vertis R98S, Shallow Assassin 99, etc.