Open & Ratchet Type 12 Point Box Wrenches (Metric) — IMPA 610831-610840

Engine room and deck maintenance crews on cargo ships, container vessels, tankers, and offshore support vessels rely on these open & ratchet-type 12-point box wrenches for fast, controlled tightening in confined spaces. The ratchet box end needs only a 5° handle swing, so it works where a full swing is impossible — between pipe runs, under deck plates, inside machinery housings, or on valve flanges in the engine room. The open end handles breaking loose and final snugging, while the ratchet end speeds up long threaded runs. This single tool covers both loosening and final tightening, reducing the number of wrenches carried in the engineer's toolbox and cutting job time during routine PMS rounds.

Each wrench is a metric single-piece unit: one standard open end and one ratchet-type 12-point box end, both with the same opening size. The 12-point geometry engages fasteners at more angles and lowers the risk of rounding bolt corners, which matters on aged or salt-exposed deck hardware. Forged from chrome vanadium steel and finished with a corrosion-resistant chrome plating, these wrenches suit the humid, salt-laden engine room and deck environments found on board. They are stocked as a full series of 10 individually ordered metric sizes under IMPA codes 610831 through 610840 — every code is available separately and priced individually, so purchasing officers and chief engineers can order exactly the sizes they need without buying a full set.

ALL-K MARINE Ship Store (trading internationally as ALL-K MARINE CO.,LTD) is a China-based wholesale and retail supplier of IMPA-coded marine stores and ship supplies. This product line is traded and sourced through qualified suppliers with pre-shipment QC inspection, not manufactured in our own factory. We hold the full IMPA range from stock and offer competitive wholesale and retail pricing with 24-hour quotations. Shipping is worldwide via freight forwarders, and on request we can deliver to your ship agent for onward transfer to the vessel. Ship chandlers, purchasing officers, and chief engineers sourcing by IMPA code can send their inquiry list for a same-day quote.