The products in this section come in a range of sizes and quantities for your convenience. Ensure that you have the correct size drill bit before commencing work. We have a range of drill bits in our ‘Tools, Electrical & Plumbing’ section to meet your needs. Expansion bolts are inserted into a hole that has been drilled into masonry and it mechanically expands to serve as an anchor for shelves, timber etc. The bolts in this collection come in a range of sizes and quantities to suit your needs.