Quite easy to use. Built-in hole for easy mounting, rotary switch. Great replacement for damaged knobs on your Gas Stove Cooker. Suitable for kitchen table gas stoves, gas ranges, or gas cooktop switch knob replacements. Product Name: Gas Stove Range Knob Fit for: Gas Stove/Range/Cooktop Material: Stainless Steel and Plastic Color: Silver Tone and Black Center Hole Size (Approx): 8 x 6mm / 0.3 inch x 0.24 inch (L x W) Size: 42 x 28mm / 1.7 inch x 1.1 inch (D x H) Weight: 111g Package Included: 6 x Gas Stove Range Knobs Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.