DYRECELVE - MULTIFUNCTIONAL CARBIDE DRILL BIT SETS DYRECELVE - CONCRETE DRILL BIT SET FEATURES Previous page Next page 1 CARBIDE DRILL TIP 2 U-TYPE SLOT DESIGN 3 NON-SLIP TRIANGLE HANDLE 4 EASY TO STORE AND USE DRY DRILLING MATERIAL FOR HARDER MATERIALS ADD WATER TO DRILL HOLES COMPATIBLE MODEL Material, Color PREMIUM Steel Alloy, Black 12-PCS Drill Bits Diameter 1-pcs * 1/8", 1-pcs * 5/32", 2-pcs * 3/16", 4-pcs * 1/4", 2-pcs * 5/16", 1-pcs * 3/8", 1-pcs * 1/2". That will help in drilling by starting with smallest bit and continuing to size needed. Suitable for Tools Masonry drill Bits for electric drill, hand drill and bench drill. Please slow down when using a bench drill. Not suitable for a hammer drill with an electric hammer. Brick drill bit suitable for Masonry wall, cement wall, concrete, glass, ceramics, tiles, cinder blocks, mirrors, plant pots, wood, marble, thin iron plates, plastic, as well as brick wall pavers, travertine, aluminum alloy, bubble brick, etc. Suitable for Home DIY, and Building/Engineering Use. Need to add rhinestones Glass, ceramic tile, marble, granite etc. please cool with water and control the speed when drilling. Cool with water and control speed while drilling. Not Applicable Not for tempered glass drilling (e.g. car glass) To open box, two steps: 1. First, use a knife to slice wrapping paper along yellow dotted line at bottom of box. 2. Next, gently pull lid up and down to open it.