Shockwave impact duty titanium drill bits with Red Helix are engineered for drills and impacts. Designed with a variable helix with an aggressive 35 Deg. helix angle which ends at 15 Deg., Red Helix provides rapid chip removal to limit heat buildup to stay sharper longer. 135 Deg. split point tip delivers a precision start and prevents walking for fast, accurate holes. Titanium coating can be used in all drilling applications to provide longer life. Set includes 1 each: 1/16 In., 5/64 In., 3/32 In., 7/64 In., 1/8 In., 9/64 In., 5/32 In., 3/16 In., 7/32 In., 1/4 In., 5/16 In., 3/8 In., 1/2 In., carrying case. No. 48-89-4630: Pieces In Set: 15 Pcs., Pkg Qty: 15, Package Type: Clamshell