Lightweight, rust-free nylon sleeves. For rotary and percussion drills and drill drivers. Set to hammer stop when using with hammers drills. Keyless operation. Capacity 2.0mm to 13mm. Lightweight, rust-free nylon sleeves. For rotary and percussion drills and drill drivers. Set to hammer stop when using with hammers drills. Keyless operation. Capacity 2.0mm to 13mm.