Feature: 1.High corrosion resistance. 2.High strength and hardness. 3.High precision, wide range of adjustment. 4.The fastest and most accurate hardware tool on the market - Install hardware 10x faster 5.Saves time wasted making wood templates 6.Patented design helps eliminate drilling mistakes 7.Reversible for quick drilling 8.5mm case hardened steel bushings are replaceable Specification: Brand new Ruler Material: stainless steel Slider Material: Aluminum Alloy Drill Sleeve Material: steel Pin Size: approx. 5mm Package included: 1 x Wood Drilling Tool Note: Please allow a little size errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.