{"product_id":"zen-wu-f-4-hammer","title":"Zen-Wu F-4 Hammer","description":"\u003cp\u003eThe F-4 is the successor to the classic \u003ca href=\"https:\/\/zenwutoolworks.com\/products\/f-1-hammer\"\u003eF-1\u003c\/a\u003e, our first hammer: a hardened stainless-steel strike face on a titanium body.\u003c\/p\u003e\n\u003cp\u003eThe standard body is TC4 titanium with a brass ring set at the seam between face and body. The titanium end carries a slight convexity for kigoroshi (compressing wood fibers so they swell back later to tighten a joint) and other shaping jobs. Titanium transfers more of the swing into the work instead of absorbing it as flex and vibration, and returns far less recoil to the wrist than a steel hammer. The handle is dyed hickory.\u003c\/p\u003e\n\u003cp\u003eThe flame-anodized version is burned to a stylized finish: interference colors from a controlled oxide layer, not paint or dye. The brass version, apart from the added weight, has its body hand-textured by chiseling. On both, the open grain of the handle is filled with brass powder.\u003c\/p\u003e\n\u003cp\u003eStrike face: S136 ESR stainless steel, 52-53 HRC.\u003cbr\u003eHead: 2-13\/16\" long, 1-3\/4\" across (70.9 × 44.3mm).\u003cbr\u003eOverall length: 11-5\/8\" (295mm).\u003cbr\u003eHead weight: 16 oz (450g) titanium; 24.5 oz (696g) brass.\u003cbr\u003eTotal weight: 20 oz (560g) titanium; 28.5 oz (807g) brass.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/zenwutoolworks.com\/pages\/wedged-handle-care\" target=\"_blank\" rel=\"noopener\"\u003eHandle care instructions\u003c\/a\u003e\u003c\/p\u003e","brand":"Zen-Wu Toolworks","offers":[{"title":"Titanium","offer_id":51828622819649,"sku":"F4T","price":159.0,"currency_code":"USD","in_stock":true},{"title":"Flame-Anodized Titanium","offer_id":51828622852417,"sku":"F4A","price":185.0,"currency_code":"USD","in_stock":true},{"title":"Hand-Carved Brass","offer_id":51828622885185,"sku":"F4B","price":225.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0705\/9773\/8817\/files\/F4_-8-s.jpg?v=1781074758","url":"https:\/\/zenwutoolworks.com\/products\/zen-wu-f-4-hammer","provider":"Zen-Wu Toolworks","version":"1.0","type":"link"}