Product Description Clamping Kit: 52/58 PCS Clamping Kits Set with metal holders. Heat treated steel with a black oxide finish. Supplied in storage rack which can be wall mounted. 50PCS Clamping Kit: Metric Size: M10, M12, M14, M16 and M18 Inch Size: 3/8", 7/16", 9/16", 1/2", 5/8", 3/4" For the details, please visit our website. In addition, we also supply the following products: (1) Cutting Tools Drills, End Mills, Milling Cutters, Slitting Saws, Saw Blades, Reamers, Taps & Dies, Tool Bits, Boring Bars, Carbide Burrs, Carbide Inserts, etc. (2) Measuring Tools Vernier Calipers, Electronic Digital Calipers, Micrometers, Dial Indicators, Squares, Protractors, Gages, etc. (3) Hand Tools Scripers, Steel Rulers and Tapes, Wrench and Socket Sets, etc. (4) Machine Accessories Tool Post and Holder, Collects, Chucks, Drill Chucks, Milling Arbors, Sleeves, Vises, Working Tables, etc. (5) Machinery Metal Working Machinery, Woodworking Machinery, Shear Bending and Rolling Machine, etc. (6) Working Equipment/Safety&Material Handling Lifting Equipments, Wheels, Halogen Lamps, Protection Gloves, Non-Woven Products, etc.