ITW Teks 21328 Screw, 10 x 1 Provides secure metal to metal fastening without the need to pre-drill and reduces cam-outs for high performance drive surfaces and recess Precise point designed to drill, tap, and fasten all in one motion Zinc plated finish protects the job's appearance High performance drive surfaces reduce cam-out to penetrate surface the first time for easy installation No tool slippage even with older sockets and worn Bits