Real Avid Smart Drive 90 - The Smart Drive 90 is an advanced gunsmithing driver set. The main driver features a magnetic bit holder, rubber grip, jeweler's spin top & 360deg LED light. It partners with the small "close quarters" driver to create Force Assist. Force Assist is a proprietary system that helps users to loosen frozen-in-place screws as well as precisely tighten screws. Comprehensive set of premium S2 steel gun bits. Engineered to precisely fit gun hardware. Designed to fail before damaging small, fragile screws and fasteners. Duplicates of most commonly used slotted bits. Polycarbonate Lid, 87 Black Oxide Coated Gun Bits, Small "Force Assist" Driver For Tight Spaces, Scope Turret Tool, Magnetic Parts Tray, Slide Lock, Large Driver With Led Bits Included: 3mm Group (9 bits), .5mm-1mm Thickness 3.8mm Group (4 bits), .7mm-1mm Thickness 4.7mm Group (4 bits), .6mm-.9mm Thickness 5.4mm Group (10 bits), .4mm-1.2mm Thickness 6mm Group (7 bits), .6mm-1.2mm Thickness 7mm Group (9 bits), .6mm-1.5mm Thickness 7.6mm Group (5 bits), .8mm-1.5mm Thickness 8.6mm Group (6 bits), .7mm-1.6mm Thickness 9mm Group (6 bits), .8mm-1.8mm Thickness