{"product_id":"proto-j4921mcf-cles","title":"Proto J4921MCF 3\/8 in Drive 21 mm Full Polish Open End Crowfoot Wrench","description":"\u003cp\u003eThe Proto J4921MCF is a 21 mm open end crowfoot wrench with a 3\/8 in drive. Per the manufacturer, crowfoot wrenches are used in hard-to-reach, restricted-access situations where a standard wrench or ratchet cannot reach, and this one has an Anti-Slip Design (ASD) open end.\u003c\/p\u003e\u003cp\u003eThe manufacturer states that the arched surfaces spread the contact forces over a greater area and keep the loads off the corners of the fastener, which helps prevent fastener rounding. The full polish finish is described as providing corrosion resistance and easy-to-clean surfaces, and crowfoot wrenches are typically used in lower torque applications. The page lists ASME B107.100-2010, SAE AS4984A. Sold as a single tool.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOpen end crowfoot wrench for hard-to-reach, restricted-access situations, per the manufacturer\u003c\/li\u003e\u003cli\u003e21 mm opening, 3\/8 in drive\u003c\/li\u003e\u003cli\u003eAnti-Slip Design (ASD) open end\u003c\/li\u003e\u003cli\u003eArched surfaces spread contact forces and keep loads off the fastener corners, helping prevent rounding, per the manufacturer\u003c\/li\u003e\u003cli\u003eFull polish finish for corrosion resistance and easy-to-clean surfaces, per the manufacturer\u003c\/li\u003e\u003cli\u003eTypically used in lower torque applications\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003cthead\u003e\u003ctr\u003e\u003cth\u003eSpecification\u003c\/th\u003e\u003cth\u003eValue\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003eModel\u003c\/td\u003e\u003ctd\u003eJ4921MCF\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eQuantity\u003c\/td\u003e\u003ctd\u003e1 piece\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eType\u003c\/td\u003e\u003ctd\u003eopen end crowfoot wrench\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eOpening\u003c\/td\u003e\u003ctd\u003e21 mm\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eDrive size\u003c\/td\u003e\u003ctd\u003e3\/8 in\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eFinish\u003c\/td\u003e\u003ctd\u003efull polish\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eUnit of measure\u003c\/td\u003e\u003ctd\u003emetric\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eOverall length\u003c\/td\u003e\u003ctd\u003e2-3\/32 in\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eStandards\u003c\/td\u003e\u003ctd\u003eASME B107.100-2010, SAE AS4984A\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003eWeight\u003c\/td\u003e\u003ctd\u003e0.14 lb (0.064 kg)\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003ePart numbers\u003c\/h3\u003e\u003ctable\u003e\u003cthead\u003e\u003ctr\u003e\u003cth\u003eManufacturer part number (MPN)\u003c\/th\u003e\u003cth\u003eBig Papa SKU\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003eJ4921MCF\u003c\/td\u003e\u003ctd\u003eBP-G-PRO-4921MCF\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eDocuments\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003ca href='https:\/\/www.protoindustrial.com\/node\/78676' target='_blank' rel='noopener'\u003eManufacturer data sheet\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e","brand":"Proto","offers":[{"title":"Default Title","offer_id":67598546632918,"sku":"BP-G-PRO-4921MCF","price":69.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0789\/8595\/3494\/files\/J4921MCF_1.jpg?v=1791939132","url":"https:\/\/bigpapaentreprise.com\/en\/products\/proto-j4921mcf-cles","provider":"Big Papa Enterprise Ltd","version":"1.0","type":"link"}