Modle Type:P622 1.Hard alum alloy magazine of stable performance and fine wear-resistance. 2.Simple, durable and trouble-free traditional blade insertion loading system 3.Light and powerfrul for continuous and efficient operation. 4.Penetration adjustable freely. 5.Headless pins very suitable for perfect decoration work. 23 Guage Pin Length;12MM-22MM(1/2-7/8) Diameter:0.63MM