Quantity: one piece Applicable: 20mm Strong and Durable: Made of high quality stainless steel and brass, wear-resistant and durable, will not damage the workpiece surface or be accidentally damaged. The perfect woodworking tool, the perfect gift for dad and brother. Fits standard 20mm diameter holes. Use two bench dogs for wide plank or scratch work. The baffle slides on the top to adapt to any type of desk. Adjustable Hole Post: The hole post can be adjusted as needed. Easy to use and operate, improve work efficiency. Suitable for DIY, woodworking, carpentry benches. Wide Application: Multi-functional partition, suitable for high-precision woodworking. The operation is simple and labor-saving, while expanding the operating range of the cutting machine. It's small and portable, and you can put it in your toolbox and take it anywhere you want to use it. Good quality product