Description1/4'' hex device countersink drill bits Sets and automatic center punch are mainly used for wood openings, reaming, chamfering, and so on. Also applies to MDF, plywood, acrylic, PVC board and metal such as aluminum, copper and so on.Features- Color :Gold and Silver .- Package Size: Approx. 14 x 3 x 3 cm. - Material: HSS. - Made of premium High Steel, the tools are durable for long lasting use. - Easy and convenient for use, hard to rust. - Suitable for DIY, home and general building or engineering use. - Applicable for MDF, plywood, acrylic, PVC board and metals like aluminum, copper, etc.