Key benefits Provides precise manual linear adjustment for machines, fixtures and jigs, enabling repeatable positioning with simple operation. Durable construction using 45 steel for the lead screw, nut and base, with a black surface finish for wear resistance and professional appearance. Foldable aluminum alloy handwheel improves clearance in tight spaces while offering reliable leverage. Wide range of lengths and handwheel sizes lets you choose the right combination for your application and mounting requirements. Specifications Product name: T25 hand crank screw set Material: lead screw, nut and base are 45 steel with a black surface Lengths available: 250 mm, 280 mm, 300 mm, 400 mm, 500 mm, 800 mm, 1000 mm Foldable handwheel diameter options (aluminum alloy): 100 mm, 125 mm, 160 mm Applications and use scenarios Workshop milling machines and drill presses: use for precise setup and repeatable positioning of workpieces during calibration and machining. Manual fixtures and jigs: adjust alignment and clamp positions with smooth, controllable travel in test rigs or production fixtures. Small CNC routers and linear slides: provide a handson feed to finetune position and engage manual control where automatic feeds are unavailable. Maintenance and compatibility Designed for use in systems that require a T25 hand crank screw set; select from multiple lengths and handwheel sizes to match mounting patterns and available clearance. For results, inspect mounting connections and ensure smooth, unobstructed travel along the screw axis during setup and operation.