BETOFAST EVO is now available in A4 stainless steel and galvanized, and with hexagonal or countersunk head. the concrete screws BETOFAST EVO range is the best solution for fast assembly and high performance on concrete and cracked concrete. Approvals ETE-16/0177: Option 7 - Uncracked Concrete / Option 1 - Cracked Concrete • Approvals Fire 120 minutes (TR 020)