Features: 1.Use with plastic accessories for DIY toys. 2.Made of high quality ABS plastic, impact resistant, durable in use. 3.Safe and non-toxic, rest assured to use. 4.85 gear accessories, enough to handle a wide range of products. 5.Simple installation, easy to use. specification:Item Type: Toy Accessories Material: ABS plastic Sector Gear(4 Kinds): 28-tooth sector, 21-tooth sector, 15-tooth sector, 12-tooth sector Worm Gear(3 Kinds): 6-6, 6-7, 6-8 Blue Spindle(4 Kinds): D hole 3, 4mm hole, round hole 2.3, 3.17mm hole spindle Large Pulley(1 Kind): 363A2AB pink pulley Clutch Gear(2 Kinds): 163A clutch straight teeth, 263B clutch gear Colorful Shaft Sleeve(4 Kinds): Three 3-way (blue, green, yellow), one white 4-way Long Spindle Gear(1 Kind): 102A long PackageList:4 x Sector Gear3 x Worm Gear4 x Blue Spindle1 x Large Pulley2 x Clutch Gear4 x Colorful Shaft Sleeve1 x Long Spindle Gear1 x Copper Gear1 x Bevel gear1 x Rack3 x Shaft Sleeve3 x Belt19 x Double-Layer Gear8 x Spindle Gear4 x Pulley15 x Single-Layer Gear14 x Crown Gear