ITEM NAME:5pcs Chinese Classic Brain Teasers Metal Magical Lock Puzzle for Kids & Adults Description: Eco-friendly material and high quality Very classic and quite interesting Good for creative thinking and improve both your IQ & EQ After getting each puzzles solved by yourself, then you will get achievement, but we still attach a diagram to satisfied with some people Great gift for adults and children Specification: Material: Metal Size(Bicycle): Approx. 11 x 5.2cm/ 4.33 x 2.04 inch Size(Chain): Approx. 5.5 x 3.8cm/ 2.16 x 1.49 inch Size(Box): Approx. 4.3 x 4.3 x 1.3 cm/ 1.69 x 1.69 x 0.51 inch Size(Plane): Approx. 6 x 6.5 x 7.3 cm/ 2.36 x 2.56 x 2.87 inch Size(Star): Approx. 3.3 x 3.5 x 6.5 cm/ 1.30 x 1.38 x 2.56 inch Package Includes: 1 Piece Bicycle Lock 1 Piece Chain Lock 1 Piece Box Lock 1 Piece Plane Lock 1 Piece Star Ring Lock SKU: FUZ0020111019464317.Great gift for adults and children. 1 Piece Chain Lock. 1 Piece Bicycle Lock. 1 Piece Box Lock. 1 Piece Plane Lock. 1 Piece Star Ring Lock. Size(Chain): Approx. Very classic and quite interesting.