Brass Monkey One is our version of the classic six-piece burr puzzle. It measures in at 7cmx7cmx7cm. Each piece is 19mm in diameter. It weighs in at just under 800g, around 1.75 pounds. It's well made and heavy. The solid key piece contains a sprung stainless steel ball-bearing which helps it click satisfyingly into place. Brass Monkey One is shown in the pictures both assembled and in pieces. This puzzle is number one of our signature range, a series of puzzles that look similar but have different assemblies. Brass Monkey Two, Brass Monkey Three and Brass Monket Four are also available. Buying them together gives a discount on the price