Slotted Plastic Block Horotec is made of high impact plastic. This can be used on it's own or as a replacement part for the Horotec 10.500 Bracelet Press (item # 67-10500).This slotted block has 9 holes, and 8 slots, slots measure from 2.8 mm wide to 6.3 mm wide. This is used to hold metal watch bracelets and jewelry bracelets upright when removing bracelet pins.