Professional Drill Bit and Screwdriver Bit Set: For metal, wood and wall drilling. Compatible with all power drills, bench drills and impact drills Screwdriver Bit Set: Made of high quality steel for a combination of strength, heat resistance and wear resistance for use. And the torsion technology ensures 10 times longer life than standard bits; Precision tip prevents cam-out and stripping. Drill Bits: With long life high speed steel drill bits coated with titanium for drilling in steel and metalwork; High quality steel masonry drill bits for drilling in brick, stone and concrete; High quality steel hole saws, brad point bits and flat wood drill bits for woodworking projects. Also includes the most common 2-inch screwdriver bits Universal Quick Change System: 1/4 hex shanks on all pieces fit quickly and securely onto the quick-change chucks of any drill, screwdriver, and driver to improve efficiency and reduce overall project time. Product Description Product Features The 21PCS Combination Accessory Set contains the perfect component sizes for high-use projects and installation. It offers a variety of drill bits for the most common uses with wood, metal, plastic, and masonry. In addition to drill bits, it also contains a variety of screwdriving bits for home projects. This handy kit also comes with a portable and durable hard case with extra storage space. Good and long service life. Excellent for DIY, home, and general construction/engineering. Color: Silver Material: High Speed Steel Package Contents: 2 * Twist Drill Bits (5# 6#) 3 * Masonry Impact Drill (5# 6# 8#) 2 * Woodworking Hole Drill (10# 12#) 1 * Glass Drill Bit 1 * Tile Drill Bit (6#) 2 * Extended Screwdriver Bit (VPH1 VPH2) 10 * Batch Head (PH1/PH2/PH3/PZ1/PZ2/PZ3/T20/T25) Only the above package content, other products are not included. Note: Light shooting 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.