Used to Pre-drill and countersink stainless steel screws when installing decking.

Overall Length:
SMART-BIT^® makes a hole 1-1/8" deep, including the depth of the countersink. It is general practice not to pre-drill the underlying (joist) material, as this is usually treated lumber and does not require pre-drilling. SMART-BIT^® provides sufficient depth for installing deck lumber up to 5/4" nominal size.

Specifications:

Size	Drill Bit Diameter		Countersink Diameter		Countersink Angle
	mm	inch equiv	mm	inch equiv
#7 Trim	3.0	7/64	6.2	1/4	60 degrees
#8 Trim	3.2	1/8	6.6	17/64	60 degrees

Fastener Compatibility
The three sizes of SMART-BIT^® are designed to work with the three principal stainless steel deck screw sizes: #7 trim head, #8 trim head and #10 flat head.