After receiving my new "25 in 1 FREEWISE Precision Screwdriver Set", I immediately put it to use repairing my sunglasses frame. A friend of mine recommended these bits to me a few months ago and I immediately saw that the screwdriver heads are high precision and made of strong, stainless steel. My son has used them for auto repair and my wife has found them extremely useful for adjusting her sewing and serger machines. Their portability makes many repairs and adjustments convenient and dependable. Very hard and durable. This highly compatible set of 24 driver heads are suitable for most electronic products, glasses, watches, drones, etc. The strong handle is made from alloy material, light and durable, and made to last. Each screwdriver head fits perfectly onto the handle and is easily changed. This compact, portable set comes with a handy leather wallet which makes it extremely easy to carry, while the unique style and dependability make for money-saving tool