10 Piece 5 Lobe Tamperproof Star Plus Security Driver Set SD8 thru SD50 5 Point Security Drivers, with Tamper Proof Pin Recess . 3/8” Square Drive Bit Holders, knurled for fingertip control . Chrome Plated Bit Holders, with better than Impact Quality and Strength . Steel, The Strongest Hardest Drivers Available . Heat treated to 60-62 RC . Press Fit 5 Point Security Bits with Tip Recess holes . Parts and case marked for easy size and part number identification . Plastic storage case . Limited Lifetime Warranty V5PSD