Penta-Plus™ Screws & Bits - Sheet Metal Screws - Machine Screws - Micro Selftapping Screws - Micro Machine Screws - Metric Machine Screws  Specifications - Flat Head - Button Head The geometry of Penta-plus makes it more secure than all other tamper proof screws. Penta-plus is proprietary to Bryce Fastener and configured to keep Torx-pin and Hex-pin tamper-resistant bits out. Other tamperproof screws have bit tips sold on the open market. Penta-plus is sold only by Bryce Fastener, maintaining its integrity as a high security tamper-proof screw. Penta-plus has been proven to be tamper-resistant and vandal-proof in some of the most extreme situations (securing laptop computers in open kiosks) without failure. Next to the Keyed-Lok® security lock, this is the most tamper proof screw on the market.