Advantages of a slot-head vs a solid peghead?

Designware Shop Solid Brass 2in X 11in Mail Letter Slot

Grendel SOLID Selot SOLID Slot SOLID Barrel Bolt SOLID di Tokopedia ∙ Promo Pengguna Baru ∙ Bebas Ongkir ∙ Cicilan 0% ∙ Kurir Instan

solid carbide t slot cutter Rotary Rod Hot Melt Slot Die utilized in hot polymer processing hot melt pressure sensitive adhesive coating 1-3 mils of 100% solid adhesive coating Rotary Rod

solidworks tab and slot Antique tools - offering low price metal precision engineered solid surace oval shape slot capsule punch for industrial use in sakinaka-andheri ,