【Usage Tips】For strong adsorption , only use the punch on smooth silicone mold surfaces ( such as PDMS or platinum silicone molds ) . Avoid using on wood , plastic or rough materials to avoid the suction cup from failing . Rinse off residual resin with water immediately after use , dry in a cool place before storage 【Complete Size Set to Meet All Needs】This set includes 7 precision hole sizes ( 2/3/4/5/6/7/8mm ) , with 5 pieces per size , totaling 35 pieces . They cover all needs from small earring holes to large keychain holes . Whether making mini pendants , pet name tags , bracelet link rings or holiday decorations , you can quickly find the right size 【No Drilling Required Design】No electric drill or post processing is needed . Before pouring epoxy or resin , just press the silicone suction cup end of the punch into the specified position of the mold . After the resin cures , gently pull it out to get a smooth and burr free perfect hole . The whole process produces no dust , no cracking and no deformation . It is especially suitable for beginners and fine jewelry making , making complex craftsmanship easy and safe 【Food Grade Silicone Material】The punch is made of flexible silicone , resistant to high temperatures ( suitable for most resin curing temperatures ) . The suction cup structure provides strong adsorption force to ensure no displacement during pouring . If the adhesion weakens after multiple uses , just rinse with water and dry to restore stickiness 【Wide Application Scenarios】Ideal for making regular earrings , necklaces , pendants , bracelet accessories , as well as pet ID tags , keychains , Christmas tree decorations , Halloween themed ornaments , wedding favors and other personalized small items . Compact and portable , it is a perfect choice for family DIY , craft fairs and teaching classes