WINOMO 360pcs 6mm-23mm Watch Band Pins Link Spring Bars Remover Tool Stainless Steel 360pcs watch band link pins spring bars and one watch pin remover in one set will be sold together. Material: durable stainless steel. Spring bars total quantity: 360 pieces. Thickness: about 1.5mm. Watch band link pins spring bars in 18 different sizes, and each size includes 20 pieces: 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm. Stainless Steel watch pins spring bars with double shoulders, used for metal watch strap links. Those spring bars are kept in a transparent plastic box for keeping the 18 different sizes separated and easy to access.