Within self tighten clamp, convenient to fixing drill guide on the wood. Good abrasion resistance. High strength and hardness. Easy to use. in use. Comes with a step drill bit and some accessories, ready to use. High accurate scale, easy to adjusting drilling height and hole depth. Adjustable dowel hole drill guide for different thickness, easy to producing joints. Multi-purpose drill guide, for drilling dowel holes and pocket holes., Manufacturer: Akfldms