Features: High-quality woodworking material: The slider is made of high-quality aluminum alloy material. Accurate in size, smooth and free of burrs, not easy to deform, and slide smoothly. The red slider is suitable for 30/45 type woodworking chute not easy to deform, please use 2.5 hexagon wrench to change the tightness of the slider, sliding the strip . The retaining ring prevents the slider from falling out of the chute. Strong practicality: easy to use, flexible operation, widely used in winding pipes, circular frames, pipes, car bodies, woodworking and construction fields, suitable for woodworking enthusiasts, designers, engineers, architects, students, teachers. Product specification length: 300/450/650mm. Product weight: 150g/220g/320g Section size 19.2X9.6mm M6 screw hole. Holiday gifts: Carpenter retaining ring slides are flexible in operation, and are perfect holiday/birthday gifts for carpenters, designers, engineers, architects, students, teachers, fathers, etc.. Package Includes: 1XWoodworking Slider Specifications: Material: Aluminum Alloy Color : Red Size1: Approx.300mm/11.81inch Size2: Approx.450mm/17.71inch Size3: Approx.650mm/25.59inch note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3.Users need to bring their own (2.5 Allen wrench).Modification parts, user board thickness difference, slider users need to prepare their own screws (M5 or M6 screws, self-tapping screws)