E-Z Ancor Twist-N-Lock 75 lbs. Medium-Duty Drywall Anchors (50-Pack) are ideal for hanging pictures, mirrors or installing shelving. The anchors are easy to install or remove using only #8 x 1-5/8 in. screw (included) and a #2 Philips screwdriver. No pre-drilling is necessary - screw directly into drywall.