Real Avid Smart Drive 90 Piece Gunsmithing Kit w/ Force Assist. The main driver features a magnetic bit holder rubber grip jewelers spin top and 360 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. Specifications for Real Avid Smart Drive 90 Piece Gunsmithing Kit: Manufacturer: Real Avid Fabric/Material: Polycarbonate Finish: Coated Gun Model: Universal Features of Real Avid Smart Drive 90 Piece Gunsmithing Kit: Polycarbonate lid Large driver with led 87 black oxide coated gun bits Small driver for tight spaces Scope turret tool Magnetic parts tray Slide lock Spin top on main driver Force assist technology helps loosen stuck screws and precisely tighten screws Rubberized handles for sure grip No Shadow led on main driver Hammer surface Magnetic tip Small driver for tight spaces Doubles as force assist lever 87 standard and metric black oxide coated gun bits Hollow ground/square cut slotted tips: 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 Torx: T10 T15 T20 T25 Phillips: PH0 PH1 PH2 PH3 Metric hex: 1.5mm 2mm 2.5mm 3mm 4mm 5mm 6mm Standard hex: 1/16in 5/64in 3/32in 7/64in 1/8in 9/64in 5/32in 3/16in 7/32in 15/64in 1/4in Package Contents: Real Avid Smart Drive 90 Piece Gunsmithing Kit What firearm models does the manufacturer say Real Avid Smart Drive 90 Piece Gunsmithing Kit is compatible with? The manufacturer says that Real Avid Smart Drive 90 Piece Gunsmithing Kit is compatible with UniversalReal Avid AVSD90: Smart Drive 90 Piece Gunsmithing Kit w/ Force Assist