UNIVERSAL DRILL STOP – The Amana Tool Universal Drill Depth Stop allows you to drill a specific depth and prevents the drill from drilling any deeper. FOR DRILLS 6MM TO 10MM – Drill bit depth stop can be clamped onto any drill from 6mm to 10mm. 1/4 drill stop to 3/8 drill stop. Overall length (L) 3/4. DRILL HOLES TO AN ACCURATE DEPTH – A drill bit stop collar can be used for the perfect drilling each time. It enables you to drill to an exact depth. EASY DRILL-DEPTH ADJUSTMENT – This adjustable drill stop collar is user-friendly with quick assembly and easy drill-depth adjustment. INDUSTRIAL-QUALITY TOOLS – Amana Tool is a worldwide leading tool provider with USA-based corporate headquarters and warehouse, specializing in industrial-quality cutting tools.