Such as cleaning auto parts, polishing burrs inside pipes, removing pipe burrs, cleaning threaded holes, they are compatible with most power tools to ensure efficient cleaning for professionals and DIY enthusiasts Made of high-quality stainless steel wire to ensure excellent durability and wear resistance. Strong bristles bring long-lasting performance, ideal for heavy-duty cleaning tasks. You only need to install one of the brushes on the hand drill hole to easily enter narrow holes and confined areas for cleaning and rust removal; it can also be used on any electric drill or die grinder to give you effective cleaning The 1/4 hexagonal shank design can be easily connected to drills and drivers, designed for narrow holes and confined spaces, and is ideal for use with right angle grinders. It can clean complex metal parts, mechanical equipment, and stubborn paint stains without damaging the surface or fine details. Our set includes 20 drill wire brushes with diameters of 8 mm, 10 mm, 11 mm,12mm, 13 mm,15 mm, 16 mm,17 mm,18 mm,19 mm, and lengths of 10cm (3.94") in. This versatile brush collection ensures you'll find the right brush for your cleaning needs. Color: Silver Material: Stainless Steel Copper Wire Nylon Package Contents: 20*pcs wire brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.