Low profile head is designed to prevent snags on uneven surfaces and easier to pull through bulkheads|Non-magnetic stainless steel locking device insures both maximum strength and the right tightness every time|Weather and UV-resistant|18 in L nominal|Smooth, notch less body reduces stress concentration points under tension, making the tie stronger and lower profile than notched body ties|Ribbed and stippled body grips the bundle and prevents slippage, rounded edges protect insulation, preventing sharp edges from damaging cables|The no slip tail provides easy grip during tensioning, Ty-Rap ties feature a unique friction surface designed to reduce slippage during installation|Provide an infinite number of locking positions while fastening the tie at the precise bundle diameter needed