This clasp has security prongs to ensure that the magnetic closure is secure, with a hammered texture finish.
Material: Free of lead, nickel, cadmium. Hypoallergenic.
The only glue I recommend for attaching clasps to beaded and fiber braids is 2 part epoxy glue as it is the only glue to forms a secure, permanent bond. Step-by-Step instructions for using 2-Part Epoxy are on my blog http://kumihimoresource.com/kumihimo/2-part-epoxy/
Dimensions: 23mm x 14mm
Hole Size: 10.5 x 7mm