Professional Drill and Screwdriver Bits Set :For metal, wood and wall. Matching any electric drills, bench drills and impact drills Screwdriver Bits Set:Made of High-Quality Steel for the combination of strength, heat resistance, and wear resistance for a of use. And torsion technology ensure 10 times longer service life than standard bits; Precision-fit tip prevents cam-out and stripping. Drilling Bits:With Titanium Coated Long-life High Speed Steel drill bits for drilling in Steel and Metalwork; High-grade steel Masonry drill bits for drilling in bricks, stonework and concrete; High Grade Steel Hole Saws, Brad Point Drill Bits, and Flat Wood drill bits for carpentry projects. Also includes most popular sized 2" screwdriver bits Universal Quick Change System:The 1/4 hex shanks on all parts fits quickly and securely on the quick-change chucks on any drill, driver, and screwdriver to improve efficiency and reduce overall project time. Product description Product Features 21PCS Combination Accessory Set contains the perfect sizes of components for frequent use projects and installation. It offers a variety of drill bits for the most common uses with wood, metal, plastic and masonry. Along with the drill bits, it also contains a variety screwdriving bits for household projects. This convenient kit also comes with a durable, portable hard case with extra storage. Good and long life.Excellent for DIY, home and general building/engineering using. Color: silver Material: high speed steel Package Contents: 2* twist drill (5 6 ) 3* masonry impact drill (5 6 8 ) 2* woodworking hole drilling (10 12 ) 1* glass drill bit 1* tile drill bit (6 ) 2* lengthened 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.