1. Create an E-commerce Website: Build a professional e-commerce website that showcases your products. You can use platforms like Shopify, WooCommerce, or Magento to set up your online store. Make sure the website is user-friendly and mobile-responsive.

2. Product Listings: Create detailed product listings for each of the extension bars, including high-quality images, product descriptions, specifications, and pricing.

3. Search Engine Optimization (SEO): Optimize your website for search engines to ensure your products are easily discoverable. Use relevant keywords in your product descriptions and meta tags.

4. Social Media Marketing: Utilize social media platforms like Facebook, Instagram, and Twitter to promote your products. Share visually appealing content and engage with your audience.

5. Online Marketplaces: List your products on popular online marketplaces like Amazon and eBay. This can expand your reach and attract customers who may not have found your website otherwise.

6. Content Marketing: Start a blog or create informative content related to extension bars, electrical safety, or home improvement. This can help you establish authority in your niche and attract organic traffic.

7. Email Marketing: Build an email list of interested customers and send regular updates, promotions, and product announcements.

8. Paid Advertising: Consider running online ads through platforms like Google Ads, Facebook Ads, or Instagram Ads to target potential customers.

9. Customer Reviews and Testimonials: Encourage satisfied customers to leave reviews on your website and other online review platforms. Positive reviews can build trust with potential buyers.

10. Offer Excellent Customer Service: Provide top-notch customer service to address inquiries and concerns promptly.

11. Shipping and Returns Policy: Clearly define your shipping and returns policy on your website to instill confidence in potential customers.

12. Analytics and Data Tracking: Use web analytics tools to track the performance of your website and marketing efforts. This data can help you refine your strategies over time.

13. Networking and Partnerships: Consider collaborating with other businesses or influencers in the home improvement industry to promote your products.

14. Online Advertising and Social Media Campaigns: Run targeted online advertising and social media campaigns to reach a wider audience.

15. Monitor and Adapt: Regularly monitor the performance of your online efforts and adapt your strategy based on what works best for your target audience.

Remember that building a successful online presence takes time and effort, so be patient and persistent in your marketing and sales efforts.