Steel construction. 1/4″ head diameter. 1/2″ overall. Packaged in 2″ x 3″ zip-up plastic baggie. These handle pins are great for the Knifemaking Enthusiast. Packaged in zip-up plastic baggie. Each bag is full, however the number of pins will vary slightly from bag to bag. (Measurements given are approximate and may vary slightly from lot to lot).