doorstops
dayton 1f616 stop collar set
adjustable drill depth stop collar set with 7 sizes 1 8 1 2 inch includes hex keys and sturdy plastic box br b features b ul li includes seven 1 piece clamp style collars from 1 8 to 1 2 in 1 16 increments with hex wrenches in sturdy plastic box li li item adjustable drill depth stop collar set li ul