WORKS ON -- Alternative to 1266 & 7463. for use on hydraulic cylinders with nuts from 2 to 6 (51mm to 152mm) and 1 to 3-3/4 (25 - 95mm).NICE DESIGN -- 1266 Reversible to fit 1/4 & 5/16 diameter pin holes, 7463 Reversible to fit 1/4 & 7/32 diameter pin holes. Both are manufactured from quality steel.COMPATIBLE WITH -- Specially designed to fit hydraulic cylinders on most farm and construction equipment. Repair tool for backhoe and other heavy equipment / farm machines / hydraulic machinery.BENEFIT -- Heavy duty wrench features a 3/4(1266) / 1/2 (7463) square drive to tackle even the most stubbom gland nuts.A MUST HAVE -- The ability of these tools to work on gland nut from 2 to 6 / 1 to 3-3/4 is a valuable quality, enabling it to be used in a variety of ways.