Quality Circular Spirit Bubble. Built in Mounting Holes on large spirit level. Size ensures a stable positioning. Levels in all directions with easy reading through black setting lines. Ideal for levelling appliances, kitchen units, shower bases and much more. Perfect for levelling your camera, tripod, turntable, clock, caravan, pool or snooker table, etc. Levels on any surface in seconds. 1000s of uses at home.