2.Alloy Steel Material:Special nickel alloyed steel heat treated for durability.With black coating to prevent rust.120-day return and free replacement if your stair railing drill guide has any quality problem.
3.Three Drilling Angle:You can quickly drill accurate 30°/45°/90° angle holes for wooden stair railings and deck posts.
4.V-grooves:90° angle holes with V-Drill Guide allow for usage on corners and even cylindrical surfaces too.(When you use the 90° angle holes,the Non-slip feet holds the Drillblock in place while preventing both slipping and marring on wooden work pieces.)
5.Note:Recommend working with F clamp or C clamp for steadier and safer drilling Avoid drill guide shaking or falling while drilling.