Self-Centering Drill Bits Set - 4/7/8pcs Hinge Hardware Drilling Kit

Feature : Save your time and energy by effortlessly creating perfectly centered holes. The Self-Centering drill bit is built with a spring-loaded guide that centers the bit. The spring-loaded guide within the bit creates precise positioning - every time. It come in 4/7/8 different sizes ensuring you'll always have the right sized bit for any job. The bits are perfect for door hinge installation cabinet installation drawers and more. Crafted from carbon steel and aircraft-grade aluminum the drill bits are durable strong and built to withstand extended use. Specification : Material: Carbon steel and aluminum 4PCS Set: Drill bit sizing: 5/64 in 7/64 in 9/64 in 11/64 in Weight:105g 7PCS Set: Drill bit sizing: 5/64 in 7/64 in 9/64 in 11/64 in 5mm 13/64 in 1/4 in Weight:215g 8PCS Set: Drill bit sizing: 5/64 in 7/64 in 9/64 in 9/64 in 11/64 in 5mm 13/64 in 1/4 in Weight:259g includes: Choice 1: 4pcs x Self-Centering Drill Bits 1pcs x Mini wrench Choice 2: 7pcs x Self-Centering Drill Bits 1pcs x Mini wrench Choice 3: 8pcs x Self-Centering Drill Bits 1pcs x Mini wrench "