If you are serious about trad climbing, you need the Black Diamond Stoppers. Their anodized aluminum heads make for fast identification when you are in a position that requires quick placement. And your second won't have to fight with the Stoppers when cleaning up the route because of the rounded edges of the heads. Sideways placements in cracks are made possible due to the transverse taper design of the the heads. Use the Black Diamond Stoppers for Trad Climbing, Big Wall or Alpine Climbing.

Black Diamond Stoppers Features:

Durable aluminum heads and steel cables
Transverse taper is versatile in flares, constrictions and parallel cracks
Rounded edges for easy cleaning (smaller sizes are straight for better surface contact)
*Sizes 1 and 2 are for direct aid only

Specs:

Size	Color	Weight	Strength	Dimensions
#1	Red	7g	2kN	4.3-9.1 mm
#2	Yellow	8g	2kN	4.8-9.9 mm
#3	Blue	15g	5kN	6.1-11.4 mm
#4	Grey	16g	6kN	6.9-12.4 mm
#5	Purple	18g	6kN	8.4-13.5 mm
#6	Green	32g	10kN	10.2-15.5 mm
#7	Red	34g	10kN	11.7-16.3 mm
#8	Yellow	37g	10kN	13.5-18.3 mm
#9	Blue	39g	10kN	15.2-20.8 mm
#10	Grey	43g	10kN	17.3-23.4 mm
#11	Purple	51g	10kN	20.1-26.7 mm
#12	Green	58g	10kN	22.9-30.5 mm
#13	Red	71g	10kN	26.4-35.1 mm