General description This wood chuck set for 95 mm (3.75 inches) is a mechanical device used to clamp a workpiece on a machine tool. Made of durable and sturdy steel, it features a 4 jaw self-centering chuck and interchangeable jaws suitable for spindles, bowls, and workpieces that are difficult to secure. The chuck utilizes the radial movement of movable jaws to evenly clamp and position the workpiece. Technical specifications Chuck diameter: 95 mm (3.75 inch) Number of jaws: 4 Thread: 1" x 8 TPI Maximum speed: 3000 R/min Net weight: 4.5 kg Carrying case dimensions: 30.5 x 22.5 x 7.5 cm (L x W x H) Inside grip diameter range: 1 Step jaws: 2.5 mm - 35 mm 2 Round jaws: 32 mm - 64 mm 3 Round jaws: 76 mm - 108 mm 4 Pin jaws: 9.5 mm - 45 mm 5 Flat jaws: 73 mm Outside grip diameter range: 1 Step jaws (Lower step): 38 mm - 73 mm 1 Step jaws (Upper step): 19 mm - 51 mm 2 Round jaws: 45 mm - 80 mm 3 Round jaws: 90 mm - 124 mm 4 Pin jaws: 25 mm - 60 mm 5 Flat jaws: 130 mm Indexed backplate: 24