Features: Adjustable metal bushings Made of aluminum alloy, anodized surface treatment, laser engraved scale Metal bushings for precise alignment when drilling holes, easy adjustment of drilling height and hole depth Specification: Name: Drill Guide. Material: Aluminum alloy. Parts: Stainless steel drill bushing + brass stop block Size: 100 x 60 x 65 mm. Maximum clamping range: 38 mm. Application areas: Can be used for woodworking, quick positioning for different thicknesses, easy to make joints. Scope of delivery: 1 x Drill Guide. Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement error for the data.