A compact, versatile drill bit and grinding head kit designed for precision DIY work. Ideal for resin casting, jewelry and key chain making, model work and light craft tasks where small, accurate holes and fine shaping are required. Key benefits Versatility: 15 different-sized mini twist drill bits cover a wide range of small hole sizes so you can match the exact drill diameter needed for your project. Saves time and effort: Using a portable electric drill or drill pen with these bits is faster and more accurate than manual drilling, improving efficiency and finish quality. Complete kit: Includes mini twist drill bits plus four grinding heads for shaping, smoothing and enlarging holes, reducing the need to switch between multiple tools. Clear limits and compatibility: Suitable for soft to medium materials up to 10 mm thick; not intended for hard metals such as steel. What’s included 15 mini twist drill bits in assorted sizes: 0.7 mm x 2 pieces 0.9 mm x 2 pieces 1.0 mm x 5 pieces 1.2 mm x 2 pieces 1.5 mm x 1 piece 2.0 mm x 1 piece 2.5 mm x 1 piece 3.0 mm x 1 piece 4 grinding heads with handle diameter 2.3 mm and an average length of 32 mm Performance and compatibility Designed for use with portable electric drills and drill pens to deliver controlled, repeatable results. Works effectively on wooden boards, plastic boards and paper sheets up to 10 mm thickness. Not recommended for drilling hard materials such as steel. Practical use scenarios Resin jewelry and key chains: Drill clean, precise holes through cured resin pieces to attach jump rings, eye pins or chains. Miniature and model making: Create small, accurate holes and refine parts in plastic, thin wood or paper components. Light woodworking and crafts: Make pilot holes, add decorative accents or prepare pieces for assembly on wooden or plastic boards up to 10 mm thick. Simple tips Use a portable electric drill or drill pen for best control and accuracy. Apply light, steady pressure and let the bit do the work to avoid cracking fragile materials. Do not use on hard metals or materials beyond the specified thickness. This kit supplies a wide range of small drill sizes plus grinding heads so you can drill, shape and finish small craft and DIY projects with greater speed and precision.