Quick Set Bow Compass. A high quality compass with automatic adjustment lever and jointed legs. Fast estimated adjustment is made by adjusting a lever found on either side of the leg. Finer adjustment is made by using the strong center spindle. The extension bar can be attached simply and distortion-free to the compass. The bar allows for circles up to a maximum of 600 mm in diameter. The pencil adapter also takes pencils, coloured leads or Indian ink refills up to 11 mm in diameter. 1 piece, accessories: spare leads, extension bar, pen holder.